He looks like a sooty palomino to me. If his dam was cremello and his sire chestnut, he has to be some kind of palomino - http://www.mustangs4us.com/Horse%20Colors/colors/6039%20-%20Green%20River%20WY%20-%20chocolate%20palomino.jpg
That's what we were thinking! He's getting those black spots all over so I don't know if he'll be a palomino like the one in the pic with some spots or what, either way I'm excited to see him next year to see what he'll look like! Thanks!!