Trixie Club Calves
Well-known member
What is everyone's favorite protocol to use when AI'ing a small herd of cattle?
AI Protocols
- Thread starter Trixie Club Calves
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chevytaHOE5674
Well-known member
We used to have very good success with a CIDR and a shot of GnRH on day 0. Remove CIDR and Lute on day 7. Watch for heat days 7-10 and breed with another shot of GnRH, breed all that you didn't see in heat on day 10. Think it was called a 7 day Co-Sync with CIDR.
OP
OP
Trixie Club Calves
Well-known member
Do you have most of your cows come into heat using that protocol?
chevytaHOE5674
Well-known member
When we AI'd we had 95-100% success rate a few years in a row following that protocol.
We have use the 7 day co-sync with CIDR with great success for many years. When time allows I'll use the 7 & 7 over that protocol as I tend to get far stronger heats and more of them. They will often rub the hide/hair right off a tail head with the 7 & 7 protocol. Either has worked well for us for many years.
simme
Old Dumb Guy
I also use the 7 day CIDR with heat detection. Results vary year to year on % showing heat. But good results most years. I pulled CIDR's on 5 head this past Monday at 4 pm. Three standing and stickers completely rubbed off at 7am heat check on Wednesday. Bred those at 5pm Wednesday. One standing with sticker rubbed at 7 am today (Thursday) with the last one doing the riding. Expect her to be standing soon. Will breed those two tonight.
The goal of a synch protocol is to closely group the heats so that they "all" come into heat at the same time. If completely successful, that would allow a timed only breeding (no heat checking). But I have had some come into heat as much as 5 days after pulling the CIDR's. No way a timed AI (52-56 hours for heifers and 60-66 hours for cows) would work in that case. Semen has a life of about 18-24 hours in the cow. A little math will predict how tightly the heats need to be grouped for live semen to meet up with the ovulated egg. It has certainly been hit or miss (mostly miss) for me to inseminate on a timed basis with no signs of heat. But have been successful breeding on those subtle secondary heat signs in the absence of seeing a standing heat and without a rubbed sticker. Just requires a closer more frequent heat check and more anxiety.
Always good to see lots of stickers rubbed off. Sometimes the 2-3 month old bull calves are the best heat detectors.
The goal of a synch protocol is to closely group the heats so that they "all" come into heat at the same time. If completely successful, that would allow a timed only breeding (no heat checking). But I have had some come into heat as much as 5 days after pulling the CIDR's. No way a timed AI (52-56 hours for heifers and 60-66 hours for cows) would work in that case. Semen has a life of about 18-24 hours in the cow. A little math will predict how tightly the heats need to be grouped for live semen to meet up with the ovulated egg. It has certainly been hit or miss (mostly miss) for me to inseminate on a timed basis with no signs of heat. But have been successful breeding on those subtle secondary heat signs in the absence of seeing a standing heat and without a rubbed sticker. Just requires a closer more frequent heat check and more anxiety.
Always good to see lots of stickers rubbed off. Sometimes the 2-3 month old bull calves are the best heat detectors.
wbvs58
Well-known member
If you are doing heat detection I find a group of at least 5-6 works best, I like 10. It takes 2 to tango. With small numbers sometimes there is not a 2nd one for the one on heat to pair up with. Also sometimes 2 will pair up and exclude any others from joining in having a bigger group there will be others to pair up with.
Ken
Ken
So need to high-jack this thread…. I like the 7 day co-sync with seeder as well, problem is it now looks like one of the cows may have been a couple months pregnant. Will the sync protocol cause abortion or miss carriage at that point?
Springfieldsimm
Well-known member
In my experience the lute will cause an abortion. From what I understand if they are over 100 days pregnant it is less likely to cause an abortion unless you give a double dose.
Dsth
Well-known member
generally after the 100 days or a couple months the pregnancy, proteins are strong enough to maintain the pregnancy after a dose of Gnrh. My first time giving a shot of Gnrh to a bred heifer she was about 6 months and accidently got bred with the neighbor's bull that jumped the fence when calf was still nursing on the cow. ended up having a full term calf.
