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What to do with open cows?
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<blockquote data-quote="ANAZAZI" data-source="post: 920556" data-attributes="member: 7541"><p>Regarding the length of the cycle, it would likely become more irregular if cows were left open for several years. </p><p></p><p> The calving would not be spread out so much because most cows tend to calve in the beginning of the calving period.</p><p>I would not start breeding season until 90 days after the first calving, why would you assume something else? This means that the best part of the herd (the early calvers, some 70% of the herd) have between 90 and 69 days to get ready for the start of the breeding season and 150 to 129 days until the end of the breeding season.</p><p>The second group (they are fewer, 20% of the herd, and less desireable in a keep/cull perspective) will have 68 to 48 days to the start of breeding season (enough time for most beef cows to get ready) and between 128 to 108 days until the end of breeding season.</p><p> Basically, 90% have a good chance to calve early next year, and the other 10% still have time because the breeding period is so long.</p></blockquote><p></p>
[QUOTE="ANAZAZI, post: 920556, member: 7541"] Regarding the length of the cycle, it would likely become more irregular if cows were left open for several years. The calving would not be spread out so much because most cows tend to calve in the beginning of the calving period. I would not start breeding season until 90 days after the first calving, why would you assume something else? This means that the best part of the herd (the early calvers, some 70% of the herd) have between 90 and 69 days to get ready for the start of the breeding season and 150 to 129 days until the end of the breeding season. The second group (they are fewer, 20% of the herd, and less desireable in a keep/cull perspective) will have 68 to 48 days to the start of breeding season (enough time for most beef cows to get ready) and between 128 to 108 days until the end of breeding season. Basically, 90% have a good chance to calve early next year, and the other 10% still have time because the breeding period is so long. [/QUOTE]
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