Jos, Vet gave a friends mare shot of lutlyse 5 days ago, took her back to vet to be palpated, vet claims mare is retaining fluid causing the mare to believe she is pregnant and causing her folicles to shrink?! Vet told my friend to give the mare a shot of oxytocin every 6 hours in the amount of 30 shots pre-breeding? What do you think about his advise, sounds like an extreme amount of oxy, and my friend is worried about the advise given. Thanks for any advise!
I'm not clear on what you mean by "in the amount of 30 shots". The standard dose for oxytocin to clear fluid is 10-20 i.u. 4 times a day (see the oxytocin protocol. Greater than 20 i.u. has been shown to have a reduced efficiency in clearing (LeBlanc et. al.).
If we have a serious "problem" mare, we will commence oxytocin treatment on the first day of estrus, and continue it 4x/day through to 3½ days after ovulation. With a mare that is in standing estrus for 5-6 days (a reasonable average), that would probably equate to about 30 treatments - 5-6 days of standing estrus (20-24 doses) and then 2-2½ days after (if she ceases to be receptive 24 hours after ovulation) - another 8-10 doses. I would recommend pinpointing ovulation and continuing only 3½ days after, as the cervix will be closed by then and additional oxytocin use would be pointless, and may cause unnecessary discomfort to the mare.
Avoid treatment with oxytocin 2 hours prior to and 4 hours post breeding.
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