I discovered that the gelding I bought my daughter had two abdominal testicles.
I first noticed that he seemed to get a bit amorous with the mares and one day actually notice he ejaculated
so I made an appointment with the vet to check him out! To say we were surprised that the vet discovered testicles is an understatment - lol I thought the vet was joking with me
Mushu was never agressive only loved the ladies. I booked him in for the op and had my mares all pg'd just in case.
Vet knocked him out and removed the offending testicles - then noticed that he was getting amorous with the mares again about 8 mths later so I took him back to the vet who took blood and discovered he had just a tad too much testosterone for a gelding. I left it for another 6 mths and retested his blood which came back with normal gelding readings
So he is officially a gelding now
Good luck with your horse