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<blockquote data-quote="Anonymous" data-source="post: 8736"><p>I agree, 15% is a bit high, but actually not that unusual. Several things should be checked out. <br>1) Minerals--cattle need them, get an accurate assessment for exactly what your cattle require. Some of the ones off the top of my head re: fertility are Cu, Mn, etc but these can EASILY be overdosed.<br>2)Disease: things ranging from Mycoplasma, Ureaplasma, Campylobacter, to virals such as BVD to some parasites (decrease pregnancy rate from sapping nutrients) can drop your rate.<br>3) Bull conditioning--running 8 bulls on 200 head shouldn't make this one as serious as long as you know each bull is fertile and not subfertile, which would make other bulls work harder to get the job done.<br>4) Other factors which you should go over with your vet....every herd is individual and there's no way of predicting which you have at your place...<br>You should have at least 75% 1st service conception rates if all of the above are correct, then another 10% next cycle, so if your breeding season were only 42 days, you'd get at least 85% conception. Don't ever expect 100% conception, but it's nice when you do get it. Sorry to be so vague on this, but it's highly individual to the operation. <br>Good Luck<br>Vicki<br>: We are experiencing an unually high open rate in our herd. ( 30 open for 200 <br>: cows)<br>: Our cows should begin to calve around the first of Febuary, but some have <br>: been predicted by the vet to calve in late June! One or two in <br>: understandable but 30! We use eight mature bulls. What factors can be <br>: causing this? We don't grain out bulls and they may not be as fat as others <br>: when they are turned out to breed. Also we don't have a regular mineral <br>: program, just salt.<p></p><p><br></p><p><br><hr size=4 width=75%><p></p><p></p><p></p><p> <a href="mailto:vcane@hurontario.net">vcane@hurontario.net</a></p></blockquote><p></p>
[QUOTE="Anonymous, post: 8736"] I agree, 15% is a bit high, but actually not that unusual. Several things should be checked out. <br>1) Minerals--cattle need them, get an accurate assessment for exactly what your cattle require. Some of the ones off the top of my head re: fertility are Cu, Mn, etc but these can EASILY be overdosed.<br>2)Disease: things ranging from Mycoplasma, Ureaplasma, Campylobacter, to virals such as BVD to some parasites (decrease pregnancy rate from sapping nutrients) can drop your rate.<br>3) Bull conditioning--running 8 bulls on 200 head shouldn't make this one as serious as long as you know each bull is fertile and not subfertile, which would make other bulls work harder to get the job done.<br>4) Other factors which you should go over with your vet....every herd is individual and there's no way of predicting which you have at your place...<br>You should have at least 75% 1st service conception rates if all of the above are correct, then another 10% next cycle, so if your breeding season were only 42 days, you'd get at least 85% conception. Don't ever expect 100% conception, but it's nice when you do get it. Sorry to be so vague on this, but it's highly individual to the operation. <br>Good Luck<br>Vicki<br>: We are experiencing an unually high open rate in our herd. ( 30 open for 200 <br>: cows)<br>: Our cows should begin to calve around the first of Febuary, but some have <br>: been predicted by the vet to calve in late June! One or two in <br>: understandable but 30! We use eight mature bulls. What factors can be <br>: causing this? We don't grain out bulls and they may not be as fat as others <br>: when they are turned out to breed. Also we don't have a regular mineral <br>: program, just salt.<p> <br> <br><hr size=4 width=75%><p> [email=vcane@hurontario.net]vcane@hurontario.net[/email] [/QUOTE]
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