I had tried to breed my breed my mare last year to my stallion. She was covered twice every other day. We could of tried one more day, but we didn't. Well, she started to act every unusual. EXTREMELY loving, wanting attention, didn't spook at objects she normally did, just plain relaxed. She even let us approach her to catch her, which she likes to be chased for a couple minutes. I'm not sure. She didn't show heat till maybe the 18th day after her last covering and we had her ultrasounded, found out she was ovulating. Her old attitude came bach after day 15-18? I'm convinced she aborted it for some reason. The vet wasn't sure either, but it was possible. Does anyone have a thought about this? She didn't have any infections either.