Desperately need advice for my gelding who is acting like a stallion?

Thank you. It’s hard to find pros where I live but I have found a young woman to help me with ground manners. I’ll get him moved and see what happens. He did this one time before when he became attached to a mare. Thank you for responding!

Some geldings just can’t handle being turned out with mares. If moving him works, then you can work on the holes in his training that you are now aware of!

I have one sort of like this, and we do keep the mare in a different pasture, but he has manners (and I enforce them) so he was fine for humans when he was turned out with her. It was the other horses that got bullied away from “his” mare.

I had an Arabian gelding that was extremely studdy with mares, to the point that he was breeding them when he was turned out in a mixed herd. He was gelded at 4 (I was young and stupid and I guess I had Black Stallion Syndrome), never bred as a stallion and the vet swore that he got everything. Horses do produce testosterone even if they do not have balls. He was a nightmare at the boarding farm where I had him after moving from a place where he had individual turnout. So he was moved from mixed herd turnout to a small individual paddock where he paced so bad he wore his feet down to nubs.

Then I was able to move to a small co-op situation. I had my large WB gelding there that called all the shots in the pasture. He set Mr. Studly on the path to eunuch-hood if Mr. Studly even looked at the mare in the pasture. It was like, all of the sudden, Mr. Studly realized he had been delegated to the bachelor herd and it was not worth it to challenge the herd stallion who weighed twice as much as him. Cured his problem.

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Experienced that earlier this summer. My 19 year old gelding who had his manhoods removed before he was 2 (I know because I was there) started to act like a breeding stallion in June! Never behaved like that before and he travelled all over with mares in the trailer beside him with no indication he even noticed that she existed.
What seemed to work for him was to remove him from that mixed boarding situation to an all-gelding herd, and because mares lived next door I bought and fed him raspberry leaves, 1/2 cup/day. Seemed to work a charm; now he doesn’t pay any attention to the girls next door.