I was hoping to breed my mare this year, but her heat cycles are a little off. She had one normal cycle, then 13 days later was back in, but wouldn't let the stallion near. Was in for 5 days, out for 7 days, back in but won't let him near her. Previously she had a fairly regular cycle, and was a little overly friendly to the stallion. On the plus side she put a set of manners on her colt and isn't allowing him to mount her anymore either. I've got the vet coming out in 2 weeks for baby shots anyway, but any advice on what I should ask when she comes out? Or ideas about what's going on? I would have thought it's a little early in the year to be going through any sort of seasonal changes.