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Artificial Insemination (AI) for Cattle
100% AI?
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<blockquote data-quote="Jeanne - Simme Valley" data-source="post: 1510626" data-attributes="member: 968"><p>I used 100% AI for maybe 30+ years - with a 60 day window. Yes, we would have a cow or two open. Some would be bred and slip the calf later. But, you will have the exact same problem with using a bull. Unless you keep the bull with them year round, you will have open cows.</p><p>We went to AI'ing 42 days, then a clean up bull for 24 days. Makes life easier, but we still ended up with an open one or more. I am back to 100% AI for past two years.</p><p>We calve spring & fall, so if I have a good cow come up open, I can give her a 2nd chance and only lose 6 months on her. Open again, shipped. I don't have any "border-line" cows sitting around waiting for an excuse to get rid of. I have to think long & hard about shipping one of my cows, because they are hard to replace. If I have a bad one, she gets shipped right away. I do have some cows that have minor problems (like a problem with a foot or don't like their udder), so I put an embryo in them, because I don't want their genetics to continue.</p><p>AI is a commitment of TIME. You have to decide if the value of your calves out-weigh the effort.</p></blockquote><p></p>
[QUOTE="Jeanne - Simme Valley, post: 1510626, member: 968"] I used 100% AI for maybe 30+ years - with a 60 day window. Yes, we would have a cow or two open. Some would be bred and slip the calf later. But, you will have the exact same problem with using a bull. Unless you keep the bull with them year round, you will have open cows. We went to AI'ing 42 days, then a clean up bull for 24 days. Makes life easier, but we still ended up with an open one or more. I am back to 100% AI for past two years. We calve spring & fall, so if I have a good cow come up open, I can give her a 2nd chance and only lose 6 months on her. Open again, shipped. I don't have any "border-line" cows sitting around waiting for an excuse to get rid of. I have to think long & hard about shipping one of my cows, because they are hard to replace. If I have a bad one, she gets shipped right away. I do have some cows that have minor problems (like a problem with a foot or don't like their udder), so I put an embryo in them, because I don't want their genetics to continue. AI is a commitment of TIME. You have to decide if the value of your calves out-weigh the effort. [/QUOTE]
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