Do your cats like to be in a box? Chubby likes to be in a box. Any old box will do. It seems the smaller the better for him.
As you can see this is a really small box. We came home one evening and found that he had taken the box off of the kitchen cabinets and put it where he wanted it, the floor. He was sitting in the box when we walked in.
There is nothing like a happy cat. Hope you are having a wonderful weekend.