This is our old cat, Slick. As near as we can remember, he's 17 years old. He has a perfectly good cat kennel to sleep in (see background...blue towel...my boys tend to give kitty cats the best treatment they can) yet I found him sitting in his empty water dish. I called him a silly cat and couldn't figure out why he would choose the hard plastic bowl instead of the cozy blue towel until one of my boys made a good suggestion.
The water dish is heated.
Now who says you can't teach an old cat new tricks?