My kitten (Mia) is a bit of a messy eater, so I place her food bowls on top of a pet placemat. After she's done eating (sometimes she eats everything, sometimes she leaves a few bites), she starts scratching/pawing like crazy at the placemat and surrounding floor. At first I thought maybe that was her way of telling me she was finished, so I started picking the food bowl up when she did that. However, she would start meowing shortly after to tell me she was still hungry. I would sit the bowl back down, and she eat more, but then start scratching at the placemat again. Why do you think she's doing this?