With some hesitation, I dropped Balu at the AniMMal ReSScue cache which is a puzzle cache involving visits to a number of gravestones in a pet cemetery (some of them were pets of well-known people, for example, Admiral Byrd's dog, Igloo, who accompanied him to both the North and South Poles).
One could argue that, in this location, Balu would be amongst his animal friends, but I suspect they would not be providing as much companionship as he might want.