My two year old Percheron cross filly has just today decided that she hates chickens. She is trying to stomp my hens when they come into her field. She has had chickens with her all her life! So has anyone ran into this? Am I going to have to get rid of my horse? I can't keep the hens out of the field. I have recently seen her chase a dog out of the field so knew she was territorial with other animals. Also recently she and the other two horses stomped a skunk. But I was shocked when she went after the hens. Any ideas? Thanks in advance!