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<blockquote data-quote="mobgrazer" data-source="post: 602896" data-attributes="member: 9043"><p>I like them to drop in the late summer to the end of fall. With 517 heifers were split in to the early and late breeders. For the 08 calving 4 were not pregnant, 3 still born, and 8 sets of twins. We had 518 drop for 138 days this year.</p><p></p><p>We put 40 cows to a bull and rotate the bulls every 10 days. So every bull works 10 days on 10 days off. After 60 days then we run all the early breeders back together with a clean up bull for 20 days. We start the late breeders the next day the same way.</p><p></p><p>As there born we log there birth dates in to the computer to determine if there going to be in the early or late group the next year. Fall of 09 will have 564 calving out of 566. Next year is an AI year so we will have a pop of 75 AI cows + the normal ones at the same time.</p></blockquote><p></p>
[QUOTE="mobgrazer, post: 602896, member: 9043"] I like them to drop in the late summer to the end of fall. With 517 heifers were split in to the early and late breeders. For the 08 calving 4 were not pregnant, 3 still born, and 8 sets of twins. We had 518 drop for 138 days this year. We put 40 cows to a bull and rotate the bulls every 10 days. So every bull works 10 days on 10 days off. After 60 days then we run all the early breeders back together with a clean up bull for 20 days. We start the late breeders the next day the same way. As there born we log there birth dates in to the computer to determine if there going to be in the early or late group the next year. Fall of 09 will have 564 calving out of 566. Next year is an AI year so we will have a pop of 75 AI cows + the normal ones at the same time. [/QUOTE]
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