I rescued a 12 year old mare from the slaughterhouse and don't know much about her history. She is my first horse. She finally trusts me enough to come running for a carrot or apple and to let me groom her. However, and perhaps I am reading her behavior incorrectly, if I do not have sufficient carrots (she likes 4 to 6 at a time at least) she will corral me when I walk back to the house. This has happened when I ran out of carrots or apples and only had one. She runs ahead of me and then blocks me with her body. When I did not respond and walked around her, she tried to bite me. Is there a way to curb aggression... yes I read I should frighten her. I waved my arms and shouted, she stepped back for a second and then blocked me again. As for the bite, she didnt actually bite because I backed away but she sure seemed like she was going to. She reached for my arm with open mouth and teeth showing. Thanks in advance.