I keep the cat's food bowls filled so that they can just eat whenever they're hungry. My oldest Sandy has been vomiting a bit lately. She is otherwise fine, eating drinking, playing normally. The food appears undigested and she usually vomits just after eating. I cannot get her an appointment with her vet until Wednesday but do plan on taking her then. My question is: If she is otherwise acting normal, is it possible her overeating will cause her to vomit?