I have an ungelded jack who is 18 months old. We found a sheep in shock with its horns ‘chewed’ off last week and tonight our lamb looks like he has gone 10 rounds with Mike Tyson. I do think it’s the donkey. I know he needs to be gelded but what else can I do to stop this aggression from him? I want him to be part of our farm life and I am devastated that he is injuring other animals.....help