Gelding still trying to breed mares

[emcorrie]

My 4 yo was gelded last autumn. He had never bred mares while he was intact. He settled down right away. He’s been living with my other geldings since then and my 2 yo filly. Now the filly has come into heat and he’s in stallion mode and was breeding her so I’ve separated them.
Ideally I’ll be putting both mares and geldings out to pasture as one group in a couple weeks. I’m not sure what the best plan is with this studdy gelding. From memory my other young gelding who was gelded at 3 kept up the breeding behaviour for a little while and then forgot about it. But I’m also worried that if this guy practices breeding all my mares all summer then he’ll continue this behaviour.
Any thoughts ?

 

[SpeedyPony]

Have you had him checked to make sure he's not a rig? I've known a few horses that were gelded late (including some that had sired foals) and the majority stopped the stallion behaviour once the hormones wore off.
He may just be taking a long time to adjust, but in your shoes I'd want to be sure he wasn't a rig.

 

[HopOnTrot]

Speak to your vet, we had a pony like this and he settled a bit with Regumate but I ended up selling him as he stressed my mare out.

 

[I'm Dun]

Have you had him checked to make sure he's not a rig? I've known a few horses that were gelded late (including some that had sired foals) and the majority stopped the stallion behaviour once the hormones wore off.
He may just be taking a long time to adjust, but in your shoes I'd want to be sure he wasn't a rig.

Ive also know more than a few geldings cut as weanlings who will do this, so its probably not related.

 

[SpeedyPony]

Ive also know more than a few geldings cut as weanlings who will do this, so its probably not related.

Hopefully not, but given true rigs can be fertile a blood test is cheaper than an accidental foal.

 

[emcorrie]

How is it possible he is cryptorchid if the vet castrated him ? I assume she would have told me if he only had one testicle to cut off?

It’s bizarre because before he was gelded he was really stressed and clearly full of young testosterone. It only took a couple of weeks after gelding for him to be a completely different horse. It’s only now that the mares are in heat that he has reimagined that he’s a stud. He’s still chill and gelding-like except for the mounting behaviour.