They sure do. We often talk about getting some more. Our girl is king of castle and it stresses her too much when we get a new one though. She was sold to us as being healthy and turned out she has incurable feline herpes. She has her ups and downs and gets medicated when her symptoms flare up. We decided to keep her and get her checked out rather than had her put down. I want to stress to you that this is a cat related problem not a devon Rex related problem.