It would really depend on the fencing and how the stallions behave. If the stable is built like a fortress and the studs behave like royalty, then I wouldn't mind. I have my horses on my own family's farm, but there is a farm down the road from us that breeds Ponies of the Americas. They always had one stud there, and he was very well behaved. The fences are decent, two panels with two wires that are hot. That stud died a few months ago, but since they had a contract to breed back some of their mares, they have another POA stud there. He is sort of crazy, and whinnies all the time, but is decent to handle. He actually is probably way to short to jump any of the fencing, poor little stallion. xD (They have had issues with the other, taller horses jumping fences, though.) As long as fences are compatible with ALL of the horses, things should be fine.