You no doubt have seen cats scratching around their food bowl, as if trying to bury the food. I read once, that this is a sign that they are over fed and they are trying to preserve the food for later by burying in in the cool earth. This does not ring true to me. It seems more like something dogs might do. With cats I always get the impression of disgust, like there was something wrong with the food and they were trying to bury it the way they bury their poops. What do you think?