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<blockquote data-quote="ENNOT" data-source="post: 288352" data-attributes="member: 3562"><p>We only use them once and then toss them. Some people have used them on their heifers, cleaned them up and then used them on their cows.</p><p></p><p>We have noticed similar results since they were first released. The first year we used the protocol that used only lutalyse and that worked out really well. Then the second year we used the gnrh and lutalyse and that didn't work out as well. Since then we have not been using them on heifers. I talked to a respected rancher and he is concerned that they are a little to strong on heifers since they are still developing. </p><p></p><p>Since then we have used lutalyse to catch the heifers we can and then hit the others again to see if we can catch them. After that they have been AI'd, then they go with the bull. The top 2/3rds are kept and the rest, later-calvers, are sold as breds. We do use the cidr's on cows still to pull up the late late calvers.</p><p></p><p>Around this country I have heard from several different people that the CIDR's seem to be causing some problems even with the cows. I think a guy should use them once and throw them away. There is something about science that does not fit totally with the nature of some cattle. </p><p></p><p>I think the CIDR's are a great tool, but you need to make sure your timing on everything is correct. A couple hours early or late because it fits your busy schedule can screw things up with the protocol.</p></blockquote><p></p>
[QUOTE="ENNOT, post: 288352, member: 3562"] We only use them once and then toss them. Some people have used them on their heifers, cleaned them up and then used them on their cows. We have noticed similar results since they were first released. The first year we used the protocol that used only lutalyse and that worked out really well. Then the second year we used the gnrh and lutalyse and that didn't work out as well. Since then we have not been using them on heifers. I talked to a respected rancher and he is concerned that they are a little to strong on heifers since they are still developing. Since then we have used lutalyse to catch the heifers we can and then hit the others again to see if we can catch them. After that they have been AI'd, then they go with the bull. The top 2/3rds are kept and the rest, later-calvers, are sold as breds. We do use the cidr's on cows still to pull up the late late calvers. Around this country I have heard from several different people that the CIDR's seem to be causing some problems even with the cows. I think a guy should use them once and throw them away. There is something about science that does not fit totally with the nature of some cattle. I think the CIDR's are a great tool, but you need to make sure your timing on everything is correct. A couple hours early or late because it fits your busy schedule can screw things up with the protocol. [/QUOTE]
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