Yeah, for a while I was expecting to have a permanent pet, but seeing them in the trees is much more rewarding. A grey raised by a human may make a decent pet in some cases, but these wilds only "enjoy" staying inside a house as long as they are dealing with a health issue. Once they feel better, they want out.
Cock o' the Walk is really a good match for him. When others challenge him and try to chase him away, he just turns around and faces them. Then they squeak with their tail between the legs, and wander off.