I am very confused right now. We have been breeding for a couple of years and bought a high bloodline and very costly mare (as a 8month old) for future breeding. We had the vet out checking mares earlier and had her checked "just because" and he found that she only has a small opening and he asked if we knew about her having a catalyst done and she had never had one before. He said that we couldn't breed her, no way, because if the stallion could gain entry that she wouldn't be able to foal because of the closing. I am not familiar with this and wanted to know if anyone has any information about mares being born like this and if there is anything that we can do about it, this would make an excellent broodmare and we wanted to show and breed her}?? Please help me!!
The puzzling thing is that you indicate that you purchased the animal as an 8 month old - in which case it would be extremely unlikely that it would have had a Caslick's procedure performed. If you did indeed get the filly that young, there are two other possibilities. One is that what is being encountered at the vulval opening is a hymen, some of which may be almost complete (or even complete) and very tough. If it is a hymen, it must be opened before breeding. The other possibility is that the mare if now mature (you do not indicate her current age) has a chromosomal abnormality that causes her to be an "intersex" animal - female external genitalia with very immature internal reproductive tract. This can be confirmed or refuted by having a karyotype run.
Thanks for the correction on the spelling. This mare is only 17 months old and we know that nothing was ever done to her like a Caslisk's procedure. My vet only said that if we breed her she will tear, if the stallion can penetrate, and that if bred she will not be able to foal. I asked if she could be opened for breeding and he said maybe, but that she would not be able to foal if bred. Is there anything that could possibly be done to bred her?? We purchased this filly for a broodmare in the future and are sorely disappointed. Please, any response or knowledge would be greatly appreciated.
I know that this is a bit redundant, but can you name what tests that I need to ask specifically to be ran? Or what I need to ask the vet about checking for. Our vet is a large animal, but he doesn't work with many problems like this, so I wanted to be able to spell it out for him. Thanks so much for all of your help, I had never heard of this before now. Thanks again Jos.
The physical evaluation of the reproductive tract will show the presence of a hymen. The University of California (Davis) can perform the karyotyping to check the chromosomal profile in order to check for a chromosomal disorder (follow that link for more details).
If your veterinarian does not have a lot of experience in equine reproduction, you might want to seek a second opinion from a veterinarian that specialises in the subject - preferably a theriogenologist - before doing a bunch of more advanced diagnostics. As I note above, the young age of the filly may be the issue here - she simply may not be sexually mature yet.
Thanks for being so informative and helpful. I have looked at the theriogenologist website and have found quite a few that are based in Georgia, that we would be able to see, and I am going to try to contact them. I will see about using UCDavis for the karyotyping, we use them for all of our bloodtests and color coat tests already. Again, thanks so much for being such a big help. Now I realize why everyone speaks so highly of this site and now I will too
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