I seem to remember in the book Horsewatching (don't have it anymore) they talk about horses being color prejudiced. Apparently it can be so bad that some stallions will refuse to breed with a mare of a certain color - So they cover her in a blanket and away he goes. Sometimes if the herd boss doesn't like a certain color, the rest of the horses will pick up on that and bully the horses of that color.
I've owned three palominos (including one currently, palomino overo), and all three have been lower on the pecking order. At one time we only had 3 horses and the other two did bully the one palomino at the time, but they left her alone when the herd grew, and other then that never really had them bullied.
Wow, some really interesting posts here. Thanks for sharing your experiences. Perhaps being palomino and sweet natured left my girls more vulnerable than if they'd only been one of the other.
Dusty, I dread to think what would have happened to my Molly if we'd not had her. First of all, they tried to pass her off as being 15! Then they were talking about how she'd been out hunting all day. She was in no state to do much more than a gentle hack, let alone go hunting.