Q: What kind of magic item slots does a dire wolf or rhinoceros have? I've heard animals can wear amulets and sometimes even cloaks. Would it be able to wear boots? If so, would it only need one pair of boots or would it need two pairs (like horseshoes)?
A: An animal can wear whatever items the Dungeon Master deems appropriate for his or her campaign. Necklaces and amulets seem to be the most common as it’s easy for most of us to picture animals wearing something akin to a collar. With barding in the game, armor for animals is also feasible. Plus, bracers or bracelets are fairly easy to imagine on a creature. I would suggest drawing the line here, as it keeps things simple and prevents people from worrying too much about equipping their animal companions. However, if you have a player who wants to focus on her animal companion, or you have an idea for a heavily equipped animal NPC, there’s no reason why you couldn’t adjust magic items to have animal-specific versions of magic gloves, boots, cloaks, etc.