If you sit next to a sleeping deer, you'll get a spell to change the pelt of someone else. :3 If they have a spell, they can change your pelt. Also, only adults can hold pelt color; it wears off on fawns. :3

[e]: Hey! I think you're the fawn who sat by a character of mine (red pelt, huge antlers). He quite enjoyed sitting around with you. :3