my 4 yr old seems to constantly be sick. wether its a fever, vomiting, or a cold. custody is 50/50 between her dad and i and he doesn't feed her proper meals, only junk food and spag os. could that be it maybe? her doc said it's probably from being in pre school, but i don't think so. i know alot of kids and she is by far the most sick kid i've seen. any ideas?