Kingston doesn't seem to be very good about getting food out of his kong toy. I just looked inside of it and there's this disgusting mound of food way down in the bottom. I don't know HOW old that stuff is, but I could barely look at it. I made my boyfriend clean it out, but he couldn't get all of it. I think the food is a mixture of a peanut butter dog treat and some pumpkin. I'm considering throwing the kong away, it is SO GROSS.