I think it's probably more when we did this work last in the last drought, one of the things that, there's a couple of things that came out of it. One of them was historically we've tended to really focus on the older age cows and to naturally just sell those oldest age groups, which certainly has its merit, because if you target those older age groups, then the flow on effects are more short lived in terms of numbers. But the other thing that really popped out was rather than just purely targeting on the oldest age groups, the other way that you can do it is go also, you might target the oldest age groups as your first point, but also consider going across age groups.
And what I mean by that is you'll have the obvious ones that you can quite easily cull out for structural reasons or cows that you're not quite happy with. But the next tier then might be pre-testing. You've got dries, they're an obvious one that go. But also then you can look at when you preg test, identify your early and late calvers. And I think that's a really valuable tool because if you can separate your early calvers versus your late calvers in a drought year, those late calvers, if you need to pull the trigger and go, okay, I'm going to send a few more off, those late calvers I think are really that next sort of cab off the ranks, so to speak.
Because one of the risks, if you just focus on those older age groups, is you could actually be selling some still very, very fertile and productive older females out of the herd. So I think using fertility can be a very valuable tool in drought time. So that whatever cows you do keep are the ones that are the most fertile, the ones that are those early calvers, because they're the ones that are more likely to get back into calf under challenging conditions.
It's a beautiful segue into the next session on breeder herd management. Thanks, Matt. Oh, there you go. Thanks, Naomi.
We haven't had any other questions popped through, so we'll keep moving on. I'll just share mine with you all.
Okay, so I'm going to touch on breeder herd management. So getting the most from those animals that we do keep on farm and making sure that the animals that we do keep are productive for us, that they're not just surviving on the farm, that they are producing cash flow and being productive animals that we've retained.
Throughout this, I'm not going to assume any knowledge. I think in agriculture, we have a bad habit of assuming knowledge from people and we don't want to leave anyone behind. So if I'm saying something that you already know, I do apologise. But I do that in the interest of the group as a whole, because I don't want to leave anyone behind or scratching their head thinking, I'm not quite sure what you're talking about there.
As we go through this, we might try and use a couple of our little tools up the top, but I'll get to those as we go through.
So the first thing I wanted to touch on was based off the information Matt's put forward, when we were doing the workshops, we had a bit of a conversation around what was your call to action or what things are starting to mull around in your head about what you might do off the back of that information that's being presented or what you might already be doing.
Some of the options that were there were, that I just put together was it might be that you need to turn off younger stock to reduce your numbers and maintain those core breeders. You may look to do pregnancy scanning. You may want to keep more or less heifers in the interest of that rebuild later. Do you need to do a feed budget to actually get a full comprehension of what that feeding cost could be for you, or do you need to do a plan for how long you can feed.
So I'll just throw it out there quickly. If anyone has any thoughts on what's popped up for them, if you want to pop it in the chat, we can have a quick look through that. Otherwise we'll keep moving on. It is a good one to reflect on and just decide at the moment as we are making some pretty tough calls. What decisions am I making and is on the light of this information, is there something else that I could be doing or that I hadn't really considered.
I can't see any little typing dots, so we'll keep moving on because I want to give Sal plenty of time in a second.
So the first thing in terms of managing our cow herd is how do we identify our most productive breeders. And it's a really simple formula. So we need our cows to calve every 365 days, so one calf per cow per year. We need her to calve unassisted. We need her to wean a healthy calf, and we need her back in calf early. And that really feeds into what Matt was just saying around making sure that we've got those animals early.
So I just want to try, if you can use the hand raise button, can you give me an indication of who is currently pregnancy scanning. Let's see if I can see those hands popping up. We've got a couple coming through there, a number of hands popping up, which is really positive to see.
So for those of you that have popped your hand up, can you keep your hand up. So if you push the button again, it gives you the option to put your hand down. Can you keep your hand up if you do fetal age. So where you get your vet or your preg scanner to actually let you know how far in calf those animals are. There are a few hands up. That's fantastic.
The reason I ask this question on why pregnancy scanning and then fetal ageing is so important relates to this wheel that you can see here. So this is a calving wheel. And this is the key to a profitable herd. It's really very simple. 365 days in the year. The average gestation period for a cow is 283 days. And so in the year we have 283 days as you can see, 283 days gestating that calf. She calves. It takes cows on average 47 days to return to estrus, so to return to cycling to get back in calf, which leaves you roughly 35 days for her to get back in calf to keeping that cycle of one calf per cow per year.
The average cycle length for a cow is 21 days. So you're basically getting a cycle and a half in this period to get her back in calf before she starts to fall out and that year spreads out. So that means by having a tight calving, we're able to get more animals in here. We might be able to do things like select for short gestation length so we can move our calving window back a little bit to give us more time. But this is the real driver in our business and in productive cows.
And when we're looking at which animals we're going to keep and sell in a year, the animals that are able to do this consistently year on year are wean that healthy calf without giving us any grief are the animals that we want to keep in our herd.
So managing our heifers to set them up well for their first joining, to my mind, is the biggest opportunity that we have within the business, within the breeding herd. And the reason for that is the timing of the first calf sets the pattern for her through her lifetime. And I've got some research I'll show you in a second on that. It allows us to put fertility pressure on them with the short join over six weeks to make sure, as Matt said, we're really identifying those animals that are highly fertile. And then we need to look after them in our first lactation.
So only 60 to 70% of first calf cows or heifers, whichever you like to call them, will cycle within that 82 day period compared to 80 to 90% of mature females. So this first calf female is where we see a lot of animals start to fall out of the system. And we want to set them up well as heifers in that first joining to try and maximize the number of animals we're keeping in the herd. If you think of the herd rebuild graphs that Matt had put up, it's so important for us to be able to get as many animals in that herd as we can to help rebuild our cash flow and get that system really up and running again.
I've just seen a chat come up there. Matt's just answered your question in there, Fiona, for you with the number of cows that were brought in PTIC.
So we need to look after these heifers. We need to get them set up well for joining. So that's now heifers that you'll be joining for this year. We really need to be focusing on getting them ready to join. And we need to look after them after that first calf so that we can keep as many of them in the system as we can. I've included the little bred well fed well logo there. It's a program that we can run for you that covers a lot of this information and it really helps you dial in on some of this work.
So the effect of calving time on lifetime production, this is some research that was done back in 1974 and it's still really tracked. So what was done here, they had first calf heifers that were joined to have their first calf. So they followed the cows through and you can see cow one and cow two.
The first cow got in calf early in that joining window as a heifer. She calved within the second week of calving. And then she was able to, because if you think back to our wheel, where she calved early, she had the time available to her to get back in calf early. She continued to calve early in the joining period year on year throughout her life.
The second heifer, who was in the same cohort, joined later, so they had a 10 to 12 week joining window. So she still got in calf, she was kept in the herd because she was in calf, but she calved in week 8 compared to week 2. So her calving and rejoining period was shortened. And because we talked about those heifers have trouble getting back in calf, we lose them at that point. She still managed to get back in calf, but for her second calf as a three-year-old, she calved in week 10. And as you can see through her lifetime, she's constantly playing catch up now.
So while she stayed in the system, we've got her compared to this cow that we were able to pick up and detect early with our pregnancy scanning and early calving. What that equates to between those two animals is the equivalent of one and a half more calves in the life cycle of that animal, which really adds up. And I suspect that number's probably gone higher now with our improvements in gestation length and growth rates.
So while both these animals stay in the herd, cow one in this scenario really is the more productive animal in the herd. And these are the cows we want to identify and keep in the system. And so if we are at a point where we're selecting based on gestation length, for example, if we choose a herd of animals that are fitting this cow one early calving window versus the back end of cow two with late in the calving window, we can pick up productivity that way.
So the next step is how do we make the most of the animals that we keep and that we purchase. I've put this little graph in here because I think this is a nice representation. You hear it a lot in agriculture and in other areas, but if you don't know where you're going, it doesn't matter what road you take.
So when we're looking at our herds now, we really need to think about what kind of animal have we got. Are they fit for farm and fit for our purpose. And are they able to do the job for us. And the type of animal we end up with, so the phenotype or physical traits that we end up with in our cattle, is a combination of the genes that we select for and the environmental conditions that they're exposed to, the non-genetic factors.
And we can manage a lot of things in those two areas to give us an animal that's going to do the job for us on farm. The key to knowing which direction you need to go is to know what market you're targeting and whether you're targeting to a feeder market, whether you're trading or you're just selling direct over the hooks. Knowing what the grid specs are or the market specs are so that you can work to that.
Having a written herd breeding objective really helps with this. The reason we say to have a written herd breeding objective is because it takes it out of your head and it gives you something to refer back to. And quite often it's not just you making decisions in your business. So if you have it written down, everyone can be on the same page.
And if you're working with an agent to buy your bulls, if you're doing an AI program and you're working with your AI tech, it makes it easier for you to actually communicate what that breeding objective is. And it doesn't need to be complicated. It could be something that's as simple as one to two sentences where you're able to note your priority breeding traits. And that could be that you're getting every cow is calving every year. You might want to shorten your gestation length and turn off stock heavier and younger. That could be your breeding objective for your herd.
You might also then build in three or four secondary breeding traits. So it might be that I've noticed I'm getting a bit lean, I've really been pushing growth and now I'm getting a bit lean, so I want to improve my fat cover. You might want to decide you may have some animals coming in that are getting a bit cranky, so you might put a bit more selection on culling for temperament or you might be happy with your carcass traits, but you want to maintain that.
But really critically look at your herd and work out what am I producing for and how can I refine that to make them suit what I need as best as I can.
So a key, there's a number of tools that are available to us. The key thing I want to say on this is don't just look at data and don't just look at the animals. I think when we start to talk about EBVs and data, there's still a lot of an attitude of, oh, if you look at the data, that's all you look at and you don't consider anything else. And that's really not the best way to handle it.
I love to use the analogy that we don't just have a hammer in the toolbox. You're not going to use a hammer to fix anything. You have a whole suite of tools. And it's exactly the same with breeding our cattle. We have a suite of tools available for us to use and we get the best result when we use the right tool for the job.
So some of the ways that you can help to select either the animals you're keeping or the animals that you're buying in, particularly coming into bull season now, is utilising breeding value. So knowing your herd breeding objective and what you want from your animals, understanding the specifications of the market or the grid that you're producing for, and utilising EBVs, estimated breeding values, and EPDs, estimated progeny differences.
You'll see these two acronyms used. Estimated breeding values relate to the breeding value of that animal and its progeny. The estimated progeny differences are quite often used in overseas analysis that are done, and that is the estimated result you would get from the progeny of that animal. So they're not the same. So just be aware of that if you're looking at them, whether you're looking at an EBV for the animal or an EPD, which relates directly to its progeny.
The next thing we have is raw measurements. I've just listed a few in here. So semen analysis, for example, making sure your animals are semen tested before you get them. And also testing your bulls each year before joining. If you're going to have an issue with the semen quality, you don't want to be picking that up at preg testing because by that point it's far too late.
So making sure that you're prioritising semen analysis and checking your bulls each year is important. When you're looking at animals to purchase, you might be looking at scan data and weights that's provided. We'll talk a little bit more on that in a moment. I do caution looking at raw data versus EBVs. The benefit of EBVs is it allows you to compare animals across herds, whereas scan data you really can only look at that data for that cohort of animals as they are on the day.
And also health history relating to vaccinations you may need. This could relate to pestivirus, tick vaccinations, a whole suite of health history things that you need to consider with your animals so that you don't have problems when you get them on farm.
Visual assessment. As we said with the toolbox, visual assessment is equally as important as utilising genetic information and breeding values. We need these animals to be structurally sound. Temperament may be important for you. We know that temperament does relate to productivity. You may be looking for a polled animal. Some people like to keep a horn gene in. Coat type if you're up north, looking for a slick coat.
So there's a number of things that we can be looking at to help us select our animals. The key is that we need to make sure that is relating to the breeding objective and knowing what we need.
So the next part of this, how do we maximise genetic investment in the animals that we're purchasing. I like to treat purchasing bulls as if you're hiring a new employee, because all you're buying with a bull is a genetic delivery device. And so treat it as if you're hiring a new recruit on the farm. So if you have your written herd breeding objective, that becomes your job description for that animal. What do you need from your new bull to help improve or maintain the key traits important in your herd. And your priority traits become your essential criteria and then you have your desirables.
If at any point you feel like you would like some help to refine what this looks like or to start selecting animals and really get your finger on the pulse with this, please reach out. We're able to help you with this. Both myself and Liam Baker, who's a livestock officer, are very keen on this area. So we're here if you need a hand. But let's treat them as a recruit and we're going to step through the next couple of bits as if we're hiring an employee as we're going through our bull buying.
So the first thing, shortlist our candidates. So we get all the catalogues arrive in the mail. It can get a little bit overwhelming and then they might end up sitting on the bench for a bit and we don't do too much with them until we get to the sale.
Use your catalogues to shortlist against your essential criteria. So go through and work out which bulls actually are going to do the job for you based on the information that's provided with the EBVs and any additional information the herd provides. And then refine it against your desired criteria. So if in a catalogue of 100, you might get 30 bulls that meet your essential criteria, you can further refine that based on your desired criteria.
Breed indexes can be helpful. So indexes are produced by your breed, the breed society for the bulls that you might be looking at. And they're done for particular markets. So you might have a domestic maternal or domestic terminal market. And these are produced based on the weighting of different traits that go into building an animal that fits that market. They can be very helpful if you've got a particular index that you're selecting for.
But I just caution with that, when you do shortlist on an index, make sure you go and actually review the EBVs of that animal against the data that you need, because every animal is going to get to their dollar value that's on that index in a different way. And an animal, while it may have an impressive index for what you're looking for, the actual EBVs of that particular animal may not be exactly what you're looking for. So just make sure you do actually take that next step to review if you're using indexes.
In terms of shortlisting your candidates, a good relationship with your bull breeder goes a long way because it gives you the chance to also ask questions around the maternal traits of those animals through those maternal lines. And the other thing I want to say there too, there's plenty of animals on the market. So if you have been buying from the same person for a long time or a select few, and they don't have what you need this year, there's plenty of other animals on the market, so take the time to have a look at what's around and get to know those other breeders and really find the breeders that are forthcoming with information that you ask of them and are happy for you to have a further look at the animal and really delve into what's going to suit your program.
Just wanted to run through this now in terms of shortlisting your candidates, because you might be thinking that's all well and good, but how do I actually do that. I've just pulled an EBV table out of Breedplan and you'll likely see something similar to this presented in catalogues. Each stud will present the data in their own way, but this is straight from Breedplan.
So you'll see across the top, you'll have all the traits listed along here that are available for that animal, so gestation length, birth weight, 200 day, 400 day, et cetera. The EBV line here, that's the EBV that relates to that particular animal. You'll see another EBV line further down and that is the breed average EBVs. So this one up here is for the animal you're looking at. The line down the bottom is for the average of the breed.
The line accuracy relates to if you had 100 animals joined to this bull, this tells you roughly where those animals would sit. So for gestation length, if we joined 100 animals to this bull for gestation length, we could anticipate that 67% would have a minus 1.4 days of gestation length and the other animals would either go above or below that. Where you have a higher accuracy, there's less movement around the EBV. So you'll still get animals hitting that target, but if you have an animal that's say 30% accuracy, the deviation bars above and below that EBV will be bigger than one that's at 90%. Hopefully that makes sense how I've described that.
And the percentile line that you'll see here relates to the animal's position against the breed average. So this bull that we're looking at here sits in the top 10% of this breed for gestation length, and if you look at milk, but in the bottom 90% of the breed for milk. So that's how those two work there.
So the way that we can utilise this information is if we have our, I've just done a bit of an example here for myself. If we have a self-replacing herd that's producing feeder cattle and is hoping to become a supplier of choice for their feedlot, the key things they're looking to improve in their herd is they want to shorten gestation length, they would like to turn them off faster, and they've received some feedback from the feedlot that they need to lift their MSA score because they're not quite high enough in their MSA.
So for this person, what they'd be looking for is they're going to select their next round of bulls. So the first thing they want to shorten up their gestation length and this is pretty important for them and they want to put a fair bit of pressure on this. So they might be looking for bulls that are quite high in the breed for their short gestation length. They're wanting to turn them off faster and in this instance they're quite happy with the turn off weights they've got, they just want to see a bit of improvement. So he's in the top 35% here, they might be happy with that. They don't need a bull that's really at the top of the breed for this, they just want to improve on what they've got at the moment.
And they need to lift their MSA score. A couple of the ways you can do that is to increase your IMF and also reduce your ossification score, which relates to the age of the animal. So here if we're able to turn them off quicker and younger and we've got above breed average for IMF, they're two things that we can utilise to help lift the MSA score for that animal. So that's how they might go about selecting animals as they're looking at the catalogue to actually shortlist which bulls could do that specific job for them.
If you're looking at the figures and thinking that's a bit overwhelming and there's too many numbers and you kind of just want to go back out in the paddock and not think about it too much, this is my favourite little button just up the top here where you can see the little graph button. When you click on that, it brings up this table, which is a percentile bands for the animals. And this is just the EBV data that's translated into graph form. So where you see the line down the middle here, that's 50%. That's breed average. So if you think of a graph that's going like this with your peak, that's 50%. Along the side here you can see gestation length, shorter, lighter, heavier, and it's at 0%. So these are the animals that are in the top of the breed for those traits. And on the other end is the animals that are in the bottom of the breed for those traits.
So if you had an animal leaning this way, they'd be longer gestation length, heavier birth weight, lighter 200 day weight. This can be a really helpful way to get a quick snapshot of animals, particularly as you've really refined what you're looking for, and it is a lot nicer way to look at it.
Looking at this though, I think there is a bit of propensity from people to want to select animals that sit all in this area thinking that that's what I need, I just need everything to be better. You don't necessarily want or need to have everything on this side of the graph. So a great example for this is milk. Out here in Narrabri, we don't want animals that are sitting right up the top at the top of the breed for milk because we don't have the pasture in front of them to support that kind of milk production. So we may just want animals that are sitting at breed average. Another one is fats. If you're getting feedback that your animals are too fat and you need to slim your fats down, you don't want an animal selectable that's sitting right up at the top here for fats, because that's not going to do the job for you. Maybe you do want them a little bit leaner.
So just be conscious of the fact that you don't need to have everything better. This is why it's important to, as Matt said earlier, everything is individual, really tailoring what you need for your herd to get you where you want to be.
We'll go through here now. So we've had our catalogues, we know our criteria, we've shortlisted them. Now the interview and remuneration, what they're going to get paid and what we're going to spend is sale day. So we want to get to the sale, remember our catalogue. You don't want to do all this hard work and leave your catalogue sitting on the bench at home, so make sure you've got your catalogue in hand.
This is where we do the visual assessment portion. If you think back to where we talked about what bulls are available, we've utilised our EBVs now and selected based on the breeding information provided. Now we need to do the visual assessment to make sure these animals are structurally sound, that we're happy with the way they're walking, to make sure that they have the temperament that we like. All those little traits that I'm a big advocate for, you need to have animals that you like the look of and there's a particular type of animal that you know will suit your operation. This is your chance to further refine your list. And this is where you can set your budget.
So you prioritise your animals you want to purchase at the sale, set your budget and stick to it. Don't get caught up in the excitement of the auction because there will be more cattle on offer that will do the job for you.
I had put a little document in there which goes to a DPI structural soundness, which has some really good information and diagrams for those that might be wanting more information on structure. I won't go into that now just in the interest of time, but we'll attach that link when we send out the recording for you.
So induction, I think this is a key point that can get missed sometimes. We don't want to go to all the effort of finding the animals we need, getting them for the price we want, getting them home and then having a breakdown or having issues with them. So key things here, look after your bulls when they arrive and plan for longevity. If they're arriving by themselves, make sure you've got other stock in the yards waiting for them so that they're not sitting in there by themselves.
Chances are they could be a little bit stirred up or a little bit upset when they arrive home, no matter how quiet they are, just from the transport and different people handling them, being on trucks and the sale and all those things. So have someone there for company for them. Give them feed and water on arrival to help them settle in. And quarantine for a period where you can and vaccinate to bring them in line with your herd health.
Most studs will be able to tell you or will have it printed in their catalogue what vaccinations and health treatments they've had. So review that and if there's anything you do standard in your herd that has not been done to these animals, make sure that you do that while they're in that quarantine period.
Conscious of your mating rates, especially for yearling bulls. We want to make sure that we're not over joining these animals and causing potential breakdowns from doing that. Assess the pros and cons of multi-sire versus single sire mating. That's a webinar in itself, so that's all I'll say on that one. But just be conscious of if you've done multi-sire joining or you've done single-sire joining, just review what you're doing, how you're doing it, why you're doing it. You might keep doing it that way, but just reflect and see if there is a better way to be doing your joining to reduce bull breakdown for better results.
And don't forget them in the paddock. An issue we see, particularly in dry times like these, is where we're really good at managing those cows through the dry and making sure they've got body condition scoring for joining. And then it comes time to do the bulls six weeks out and we think, they're looking a bit run down, I've sort of forgotten about them, I'll chuck a bit of hay out.
The process of spermatogenesis, so sperm production, takes 64 to 74 days for bulls. So if you're getting to them six weeks out and thinking I'll just give them a bit of feed, they probably need a bit of a pick me up, you're already too late. You've already missed a window in your joining period for them to have functional sperm that can do the job. So just be conscious as we're approaching joining again to make sure that you are looking after your bulls in the same way you're looking after your females.
The last thing I wanted to touch on, which relates to a herd rebuilding project we've done with UNE in the Southern Queensland and Northern New South Wales Innovation Hub, is just some technologies that we've, through that project, we've evaluated on commercial properties in the northwest and northern tablelands. I've left this slide in because these are also technologies that can be valuable for you to use in dry times as well. We tested them in the context of rebuild, but you can utilise them now.
So the first is commercial genomics. And that's where you're able to utilise a DNA sample taken with a tissue sampling unit from the animal's ear, and you send that away for analysis and get EBVs for those animals that you test. So you can look at the commercial animals with the same scope that you have your bulls in terms of their genetic merit and phenotypic potential for particular traits.
Commercial genomics has got more and more uptake at the moment. There's a lot of providers that are available. It can be expensive, but if you are at the point where you've culled your animals that aren't in calf, you've culled your animals that are late in calf, you've got a really nice cohort of heifers and you're not quite sure which ones to select, that could potentially be an option to give you some more information, another tool in your toolbox to be able to work out what you're going to select and which ones to keep.
The next is fixed time artificial insemination. So some of you are probably familiar with artificial insemination or may have done programs in the past. The difference with fixed time AI is that you're synchronising the estrus of the animals, so it's less labour intensive and you're not having to go through the process of heat detection. So all the animals in the program get AI’d in the same window. And the other part of this program that we've used is to evaluate the use of sexed female and male semen. So that's where semen's actually sorted into XY and XX chromosomes to give you all bull calves or heifer calves.
Some of the key findings that we came from that project, which I wanted to touch on that could be relevant for you now as you're getting set up for a spring joining as well, we found that the heifers that were joined to the sexed female semen were really valuable for herd rebuild. If we're doing our breeding programs well, they should be getting better each year and with each generation. And so those heifer calves are the ones that we want to keep in our herd because they should be our highest genetic merit animals in the herd. And so by AI-ing them to a sexed female to have a heifer calf, we can then accelerate the rebuild of the herd with high genetic value animals. If you think Matt was talking about overselecting for heifers, let's make those really high quality heifers and get more of them to select and rebuild faster.
This program also found that the heifer calves that had a heifer calf at foot, more of those animals were able to get back in calf because the growth pattern of the heifer better matched the growth needed in that first calf heifer compared to the ones that had a bull calf that had a higher growth rate and was taking more from her as a first calf heifer. So that was another interesting finding.
In this program, one of the things that we found that could work well was if you're AI-ing your heifers with sexed female semen, you could look to AI your cows with sexed male semen for your cash flow, so to pull off those big thumping steers from those cows that can handle it.
So we found there's more variation within herds and between herds in terms of the animals when they were tested for genomics, so the EBVs for those animals, which really told us that for these herds that are actively selecting for particular traits and are really clear on their breeding objective, those animals that they were producing with the heifers weren't being retained in the herd. So that's been a real learning for them to make sure the animals they're selecting for are actually being kept.
And sorry, I've just touched on that there too. So genetic selection is one part of the puzzle, but genetic retention is the other. So making sure we are keeping those animals in that we're actively selecting for.
That's it for me now. I'll just check if there's been any questions come through. It's quite a lot thrown at you. Fiona's got her hand down. Did you have a question? Nope.
If there's no questions, I'll pass over to Sally to cover off on her nutrition and feeding, which will be very valuable for you all. Over to yourself. Thanks.