I dare say you have one Nawtee boy on your hands! I would say get a playmate for him, but you already have another kitty. I assume he is neutered as well? Does your other cat play with him at all, or is he a very laid back non-playful kitty? I guess you "could" consider getting a young kitten and see if it would tire him out some. Other than that, I know a few members here have used different sprays and medicines to calm their kitties, but I've never tried any myself.

Last resort, talk to your vet and be sure there isn't medically wrong, or get a prescription for something to calm him. Good luck!

Kim