The Thief

I know, Snuffy doesn't look the part, but he's stolen Lizzie's favorite spot. He did this about a week ago and he won't give it up. I think Lizzie started it when she usurped his spot one morning just to see if she could get a rise out of him. It didn't work. Snuffy moved to her spot and has been there ever since.

Could somebody explain cats to me?