I've been around horses, but I certainly wouldn't call myself a horseman by any means. It's a combination of being very aware of them, and not trusting them.

Cooper (born 1976) author and trader
Chris Cooper (American football) (born 1977) American football player
Chris Cooper (broadcaster) British football commentator
Christian Cooper American comic book writer
Coop (artist) (born 1968) real name Chris Cooper
Chris Cooper (baseball) Baseball pitcher.