
03/28/13, 09:59 PM
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Join Date: Feb 2008
Location: Saskatchewan, Canada
Posts: 796
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We've had preemies/abortions as much as 3 months ahead of calving. Sometimes you notice them, sometimes you don't. I find that 6-8 weeks ahead of calving season seems to be the most likely time for abortions. Most of those, you never find the calf, you'll see a cow with blood on her or with cleanings.
This spring we have 6 cows (mature ones) that have shown up 'bulling', they were all preg checked in late October or early November, and all were called bred. We never saw any sign of them aborting. Then, we've had some cows we are custom managing, 1 aborted in Jan, and 2 calved in mid Feb, about 3 weeks ahead of their earliest due date. Plus, now we've also had 2 preemie (approx 3-4 weeks early I would guess) out of our own cows, and both of them are alive and going strong. Both cows cleaned quickly too.
Not sure what is going on, both herds of cows are vaccinated for all the basics. Ours are vaccinated with one brand, and the custom cows are vaccinated with a different brand.
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