My 6 yr old mare got out of the pasture the other night. My neighbors colt who is almost 3yrs old jumped his fence and they were together all night. Both, my neigbor and I fixed our fences and thought everything was good. WRONG! They both got out again the next night and ran around together for atleast an hour. Another neighbor came home to finding the colt, either trying to mount my mare or had just finished mounting her. My mare was in heat during this time. I penned my horse up til I can get around back and string more wire up to keep her in. The neighbors colt jumped their fence a 3rd night can came down to see my mare. She showed no intrest in him this time. Could she have been "caught" by him or just went out of heat and didn't want anything more to do with him? The owner of the colt acts like it's no big deal. He says, "Oh he's just in love." If she is pregnant, ok, but November is alittle too cold to be dropping a foul in my opinion.
Since both our horses got out of their pens/pastures can this colt's owner make me pay a "stud fee?" }
The chances that she was bred at a time when conception was likely is high. Mares ovulate in the last 24-48 hours of "standing heat" (receptivity to the stallion). They do not go out of heat because the are pregnant, they go out of heat because they have ovulated. As you can see therefore, the timing was pretty much right on the money.
The question concerning the stud fee is more a legal issue than an equine reproduction one, and a lawyer should be consulted if there is any question of the likelihood arising, but I believe you will find that you are not only not liable, but that the stallion owner may be liable for any veterinary fees associated with the pregnancy if negligence in fencing can be proven - it may however be considered an equal liability as this is a shared fenceline.
The most sensible thing to do would be to talk to your veterinarian about getting a dose of prostaglandin to give to your mare in about 6 days, and then confirming that she is not pregnant by either ultrasounding her at ~16 and 28 days days her last breeding, or possibly giving her another dose of prostaglandin 14 days after the first.
Avoiding her being pregnant will prevent a variety of potentially unpleasant outcomes. And remember... good fences make good neighbours.
About 10-15% of mares will continue to cycle year-round. If you want more details, please see my reply to your question at that location (follow that link), which is essentially the same.
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