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Thinking of "Unregistering" A Few--Advice?
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<blockquote data-quote="SPH" data-source="post: 1400613" data-attributes="member: 20580"><p>Hope I don't offend anyone by expressing the view that I am about to say... Why aren't you culling this defect out of your herd, especially when the progeny is also testing positive for it too? Especially if you are selling any kind of seedstock off your farm, I get that you aren't selling those that tested positive and I'm glad you are taking a hard stance on that but why would you want to keep replicating this gene within your own herd by keeping the females? I get that you say they are good cows but would you keep a bull that tested positive for a defect? It's kind of like saying you're OK with keeping animals that carry a defect such as Hypotrichosis because you need the other animal you mate it with to be a carrier also in order for the defect to show up so you'll just be careful when you make breeding decisions. You're going to keep replicating the defect in herd if you keep any females that have it so the only way to really manage it without getting rid of your cows that tested positive for it would be to not retain any progeny by them and only use them for terminal calves. To me a better cow is one that tested free of defects, it may hurt to cull cows that are productive but you'll benefit more in the long term by riding yourself of this problem.</p><p></p><p>I'd be more worried about pinpointing where you are getting the defect trait from and making sure you don't continue to replicate it within your own herd. This is why I am glad breed associations are moving to requiring more DNA testing in order to register cattle. AHA requires it of any bull you want to register calves sired by and many guys now are just doing it on any bull they sell regardless if they are going to commercial herds because it's a great tool to have that you can guarantee up front that the bull a guy is buying from you is already tested free of defects. I believe that donor dams also have to be DNA tested in order to receive ET certification which is another good thing IMO too. In a herd of 17 females and at least 3 are known defect carriers that is 18% of your herd. The problem is not with the testing and the results you are getting and whether or not to register them is the solution. The problem is that the trait exists in your herd and the solution should be taking the necessary steps to rid yourself of the undesirable trait which probably includes doing some more testing within your herd if you say you have a closed herd.</p></blockquote><p></p>
[QUOTE="SPH, post: 1400613, member: 20580"] Hope I don't offend anyone by expressing the view that I am about to say... Why aren't you culling this defect out of your herd, especially when the progeny is also testing positive for it too? Especially if you are selling any kind of seedstock off your farm, I get that you aren't selling those that tested positive and I'm glad you are taking a hard stance on that but why would you want to keep replicating this gene within your own herd by keeping the females? I get that you say they are good cows but would you keep a bull that tested positive for a defect? It's kind of like saying you're OK with keeping animals that carry a defect such as Hypotrichosis because you need the other animal you mate it with to be a carrier also in order for the defect to show up so you'll just be careful when you make breeding decisions. You're going to keep replicating the defect in herd if you keep any females that have it so the only way to really manage it without getting rid of your cows that tested positive for it would be to not retain any progeny by them and only use them for terminal calves. To me a better cow is one that tested free of defects, it may hurt to cull cows that are productive but you'll benefit more in the long term by riding yourself of this problem. I'd be more worried about pinpointing where you are getting the defect trait from and making sure you don't continue to replicate it within your own herd. This is why I am glad breed associations are moving to requiring more DNA testing in order to register cattle. AHA requires it of any bull you want to register calves sired by and many guys now are just doing it on any bull they sell regardless if they are going to commercial herds because it's a great tool to have that you can guarantee up front that the bull a guy is buying from you is already tested free of defects. I believe that donor dams also have to be DNA tested in order to receive ET certification which is another good thing IMO too. In a herd of 17 females and at least 3 are known defect carriers that is 18% of your herd. The problem is not with the testing and the results you are getting and whether or not to register them is the solution. The problem is that the trait exists in your herd and the solution should be taking the necessary steps to rid yourself of the undesirable trait which probably includes doing some more testing within your herd if you say you have a closed herd. [/QUOTE]
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