I read an article that a mare was born a mare and when she or another mare went in heat she was all studdish and mounting mares. They did a bunch of testing and found she had a lot of testosterone she they palpated her to check her ovaries. Not only did she not any ovaries but she had hidden testicles!! They had to geld the mare. It was in an AQHA magazine. I couldn't believe it but interesting.
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