If you think your cat does a good job creating a warm bed space, try a 91 lb. dog. Of course, then there comes the small problem of getting the dog out of the space so a human can use it, an act the dog thinks is dog abuse.
My cat is not 91 lbs, but is close to a third of that. And I know what you mean about their disgust when it comes time to claim my ‘rightful’ spot in the bed!