Okay, so I got a new horse a week ago. My current ottb is sensitive and has always been bottom of the pecking order so the only horse he’s actually gotten along with is his mini. I kept the new guy separated to make sure he wasn’t going to pick on mr. sensitive. They seemed interested in each other so I moved new guy even closer, in a round pen up on the fence line of my ottb and mini. Some squeals but no pinned ears or rearing/kicking. After 2 days of the round pen I put them in together and turns out my ottb finally decided to man up and is now being the dominant one, being VERY possessive over “his” mini! Poor new guy keeps getting run off and cornered and has a bite on his hip. The mini wants to make friends but the ottb won’t let him near the new guy. I pulled him out and they are sharing a fence line again and ottb is herding the mini to the complete opposite side of the field.
What have/would you do to calm down the possessiveness? Do they just need more time to duke it out? I don’t want it to escalate into anything dangerous.