[QUOTE=rodawn;4289347]
PS: Also, you can post this question on this web site: www.Equine-Reproduction.com on the “Breeding the Problem Mare” board. While this board is all about breeding, perhaps someone on there has also experience with mares who experience pain during ovulation and you might be able to get some additional help. To me, it is obvious from your description that she is having a physical pain problem and someone on this board might have some additional ideas for you.
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I have a mare that gets very sore in her back for about two days every cycle. We first noticed it when she was 3 and starting under saddle. When we bred her we found out why - she does not ovulate until the follicle is over 60mm - usually at 65 or 67, which is large. Now, if I suspect any mare is experiencing discomfort related to her cycle or possible cysts, we ultrasound to see what is going on.