The EXACT same thing happened to me last night. It was why I got on the board to ask about in the first place. I just moved my cal king up to a hopper since she has been eating three fuzzies for a few weeks. It was not enough food, and she went for one of my knuckles three days later. I knew she was still hungry because she has never done that before. So, I figured I should feed her some more. I put her in her feeding tub and she mistake her tail for food and started "eating herself!" I figured she would figure this out quickly but it became quickly obvious she had not. So I pulled her tail out of her mouth. She had gotten a 1/2 in. Crazy! I wonder what would have happened.