Quarter horse. I am no longer considering this mare Thank you everyone for your inputThose aren't good pictures, unless someone is trying to show off her butt. I think the camera angle is partly to blame, but the only way to know is to take better pictures or go see her. She has a bit of a thin, inverted neck, but that could be lack of carrying herself properly. Is she a Standardbred or a QH? Healthy-looking coat.