I still give Cubby a can of cat food. I only use it as a treat every now and then. He is getting a little to big boned (I'd rather use the term big boned than plush) now though. As a kitten he never got canned food. He always refused to eat it. Then once he became an adult he loved it.

I would think to only give them a half a can to share now. Then slowly reduce the amount you give them. We have never been good at getting any cat weaned off of anything though.