That will totally depend on the family so ask. Some exclude all animals products. Others include milk and/or eggs and especially for children. If it is true vegetarian then you will need to exclude milk, cheese, look for dairy in breads, crackers, breading on chicken nuggets etc. Yes geletin is an issue so jello, some yogurt but then that would be off because of dairy anyways. There is a becel margarine that is dairy free I had to use with one of my daycare kids that had an allergy to milk. Milk is in a lot of foods. It is also in a lot of my baking - muffins especially.