I have 2 female pygmy goats who have started being boisterous. The larger of the two is usually very friendly and placid, whereas the other smaller one does not like being touched too much. It is the smaller of the two that is causing the trouble, she is really bullying the other one and headbutting her. I am having to stand next to them while they eat to avoid a fight! The little one does not headbutt me but she has attempted to headbutt other people. They have been together since birth and are approximately 4 years old. Does anyone have any good ideas about how to help this situation?