I have a gelding named Donny, and two mares. Donny thinks he's the 'stallion of his mares', so when I bought my new QH gelding, (3 yrs old), Donny's trying to 'protect' his mares and won't accept him. He chases him off and Cash (my new gelding) has bloody hoof marks on his rump and Donny has a bloody noes. Yesterday, Donny cornered Cash between the barn and a post and forced Cash through that ONE foot of space (I measured) And out of the pasture into our yard. Thankfully, I caught him. But I DON"T want that happening again. Today's a little better, He chases cash off but doesn't keep fighting. My mare, Peanut, loves Cash and she's always trying to be with him but whenever Peanut goes to Cash, Donny goes after cash again. Separating the horses is not an option. Will they settle down eventually? I don't want them getting hurt badly. Peanut wants Cash, Cash wants Peanut, but Donny doesn't want Cash and Peanut together.