one of my male pigs has recetnly been agrressive when i try to hold him he just runs and scwerms away but when i dont let him run away and im trying to keep him still to pet him he tries to bite me, also i have his brother , when they are both in my arms johnny (the trouble one) starts too fight with alan ( the good boy) johnny just started to act like this, he was fine and sweet when he was a baby is it just puberty, does he need to be in a home where he is the only male pig. if you have any suggestions to help my piggy have a happy life please tell me i dont know what to do ?