we had a raccoon come in the dog door faithfully everynight to eat out of the dog dish. we couldn't figure out what kept eating all of his food since he gets locked in my bedroom with me for the night. well one night we decided to sit up and we watched the little critter come in, take a mouth full and a handfull and turn around and walk back out. five minutes later she was back for more until the dish was empty. we figured she had babies to feed, so we didn't mess with her.