I put Angel (my mare) in with another mare and my stallion. Angel jumped on the mare like she was trying to bred her. Ok, I thought, I would take Angel out for awhile --that she was probably trying to be the more dominant mare. I have had her out of that pen for a while. Tonight I took them all out tonight and walked them. When I walked that mare by Angel's pen she started acting up - just like a stallion would. Running the fence line, making noise, even rearing up. What a stinker! She doesn't do that for anyone else.For some reason she has it in for her.