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Timed AI breeding

H

Hoop

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Joined
Jan 23, 2006
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Location
Northern Michigan
Does anyone use timed breeding? We've done it for the last 3 years( gnrh, cidr, lute than gnrh at time of AIing, I think heifers at 54 hours and cows at 60. We didn't heat check at all, this year we hit 80% on the cows but heifers are at 50%. Typically we have been 60-70% on the cows, this year was exceptional. This year we are going to MGA on the heifers and heat detect for a couple days. They are on free choice sorghum-sudan baylage with 4#/day of 1/3 soymeal 2/3 cracked corn. Replacements look good, gaining around 1.5-2#/day, alittle condition but not fat.
We've never done real good on heifer conception on the AIing. What am I missing? anybody got suggestions? 3 years of the timed breeding on the heifers and I just not happy with the results.
 
I use MGA on heifers too and 60-65% is as good as I've ever done. Wish it could be better but if I need 90 bred heifers I'll breed 160. That way I'm done calving heifers by the time my cows start.
 
Hey Hoop, explain to me how you syncho your cows. I've seen people use ciders and I would like to try it on my cows. Every one tells me that MGA only works on heifers and is basically a waste of time on cows. How many days do you leave the ciders in for? Are you just doing timed breeding, wow thats a greta percentage for timed breeding from what I have been told.
 
This site lists several protocols that look promising, I haven't decided totally on which one I am going to use yet.

http://www.bovine-elite.com/estrus.asp
 
I would back the heifers off the hot ration get them a little green then flush them with good feed a month prior to breeding.Were getting 85-90% on heifers this year. Last spring I fed corn screenings and hay all winter and kept them green. In mid march the heifers went on full corn silage and free choice hay. It looks like our best breed up ever on heifers.I quit cyncing cows I just breed on natural heats in may on the cows cydrs work but at 50% conception I did'nt like all the wasted money and the cow's get so strung out if they don't get bred off the cydrs some would go from march calvers to may calvers.
 
Strawking, the protocol we have used is listed in the back of most of the AI books, genex,abs,etc, Fixed-time AI. We give a shot of gnrh and put the cidr in, on day 7 we pull the cidr and give a shot of lute. Then 60 hrs after pulling cidr(+/- 6hrs) we breed and give another shot of gnrh. We had a few cows jumping and bulling ahead of breeding, 50% or so. From what I've been told the shot of gnrh at breeding is key to dropping egg. We bred in early May last year, bred 25 cows, 3 were short cycled, only 40 days out from calving, and 2 of those caught. We did pay more attention to keep everything clean and as sterile as possible, I think that helped with upping our % and breeding within an hour of 60 hrs. We bred 10 heifers they were bred at 54 hrs +/- 2 hrs and our % on them was poor. to expensive for that result on heifers thats why we will go with MGA this year.
 
Denny, I agree with the cows getting strung out when they don't catch but I don't have the time to heat check. We started the heifers on grain about 40 days ago, and plan to breed last week of march. Its close to what you did they will just be on a little longer.
 
Hoop said:
Denny, I agree with the cows getting strung out when they don't catch but I don't have the time to heat check. We started the heifers on grain about 40 days ago, and plan to breed last week of march. Its close to what you did they will just be on a little longer.
Click to expand...

If I were you I'd put those heat detect stickers on them when you pull cydr's you will get some in standing heat nearly 2 days before the rest.Also I'd heat detect the day before the timed breeding we normally breed more that evening than the timed the following day.Then keep an eye on them for a few days to catch the late ones. A little bit of time heat detecting will pay for itself.

Sounds like you've got them in good enough rig to breed and you've got them flushing already. We breed the end of may so thats why my timeing is different.
 

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