I know a thoroughbred mare, never on the track, who has a lovely owner. I knew this mare from the time she was a foal to present day. She was never subjected to abuse or neglect. However, you do have to watch your back with her. She can be sweet (when you have a peppermint) but that is about it. She hates being petted or loved on (petted doesn't sound right). She will try to kick and bite you if you walk pass her. She acts this way to other horses too, more so in her stall. There has not been any reason for this behavior based on her passed experiences. But yet she continues to act out. I never want to say she's mean (but some would I supposse). She's just not loving. If she was a person, she would be a biker chick dressed head to toe in leather smoking a cig. That's just her personality.