Well what if it is the color thing? AS stupid as it sounds, maybe get some of that stuff that covers roots? Spray the socks or whatever that he doesn't like...paint an appy patch on? Maybe he just doesn't like "blondes" or whatever?
God I can't believe we're talking about a horse haha
Well, here are the two mares in questions. Similar phenotype wise, but not so much colour wise. Maybe it's because they are beefier then he is right now??
Anyhow, I left them in there together and he actually made a small advance on her, so maybe he's a bit shy with me there. Just a pain staring out the window to see if she actually covers her or not.