Tilly scratches everything. She scratches by the food dishes, the water dishes, any bed she is about the lay on, and sometimes just the floor. She also tries to cover her throw-up if she's had a hairball. She was a stray before I got her, so maybe it was something she did in the wild to cover her scent and hide her food.. who knows! Whenever I see her do it though I freak because I'm afraid that either she has been sick, one of the other two have been sick, or someone has bathroomed inappropriatley!