Re: What I learned from our local preschool for disabled kids....
My son went to a 50/50 developmental preschool (half "normally" developing kids, half "at risk" or diagnosed with something), and this was NOT the way they operated. The kids had to constantly wash their hands (upon arrival, after sneezing, before meals, ect). They were VERY strict about it.
Their snack/meal schedule did leave a little to be desired, but as pp mentioned, they had a fairly limited budget, but that doesn't mean that they couldn't do the best they could with the money. It doesn't sound like they are offering/providing the required balanced meals - you can always make a complaint to your local DSS or whoever manages the child care in your state about the snacks/meals provided, and they wouldn't know it was you.