Question on Trying to AI to Soon After Calving

I've got a few late calving heifers mixed in with a group we will AI in early December.  When I put CIDRs in some of those late calvers may only be just over 30 days after calving.  I have no expectation that they will stick to AI, but will I help or hurt them to breed naturally later on by putting a CIDR in them.  We run these things through the chutes in a hurry and I'm trying to decide if I need to bother separating the late calvers out beforehand.  I won't even actually AI them, but if it might jump start their cycles I'll go ahead and give them the CIDR/shots.

For the CIDR to work the late calving heifers have to be producing a CL which they probably won't be. A shot of FSH should kickstart their ovaries for ovulatiing.

I would go ahead and set them up and breed'em. I get over 50% on anything 30 days post and it won't hurt them on down the road. I wouldn't use high priced semen, but I would definately AI them. Brent

There was a thread on CIDR usage to jump start them and I don't remember what it was under, but if I remember correctly putting them through the protocol cycles them earlier than if you hadn't used a CIDR.

A few years ago, I did a little experiment with 10 May calving cows that I had kept in a small pasture surrounding our feedlot. I had heard from some people that the CIDRs we get here in Canada could be used 3 or 4 times before discarding them. I thought I would try it on these cows. Most of these cows were only 3 weeks post calving, so I knew i was gambling. I CIDR'd the cows. pulled them and watched for heats. All 10 came in heat within 3 or 4 hours of each other and they were all AI bred, with no clean up bull used. 9 of the 10 calved AI calves in March the following year. I was open and was shipped to market.

CIDRs worked extremely well on backing this set of cows back into the calving period with the main cow herd.  I usually have over 100 CIDRs around that have been used once, from our ET program. I use these CIDRs in cows I am trying to move their calving back. I also use them in synchronizing sets of cows to AI or to be recips. I do not use used CIDRs in heifers or in donor cows. Maybe it is OK to do so, but I just haven't done it.

So I have a few cows that are a few months behind what I want. I would like to calve in Feburay, The first cow will be calving in late march and the last in early may.....What/how would you suggest I move them foward? Thanks

Putting a CIDR in a cow that short in days postpartum will really help.  I've seen it work.