Hello all! I am new to the forum but not to horses ponies and the like. I have a 1.5 yo who was gelded at around 10 months (if the information from the seller is correct). I had him alone for about 3 months before he was joined by a 6mo filly and colt. He initially was very territorial as we introduced them thru fence for about 4 months. I put them together and they seemed to do great, but in the past month he has begun chasing, biting, nipping legs of bithe the babies although he seems to go after the filly more. They are out to pasture during day and in corral at night and location and doace doesn't seem to change him. I have spent a lot of time trying to correct him but cannot be with them constantly. This us a new behavior to me after nearly 35 years of horses. I would love some info on what yall think I should do. My dad says "they're just playing "... but Scarlett doesn't feel that way I'm sure! Thank you all!