My contract states that parents must provide special foods. For instance, I have a lactose intolerant boy in care so the parents send the cheese and milk. When I make something like cheese quesadillas I make his with his rice cheese and it's no big deal.

However, I would not like it if the parents sent in other food for their children when I am planning my menus and buying my groceries to feed all of them. Sometimes parents send in some cookies or other treats though and I'm fine with that.

I think your friend should ask the caregiver for a meeting to talk things over or call her and have a talk and come to an agreement. Personally, I would have already done that if I were the caregiver so I don't know what happened there but I always keep open communication with my clients and talk to them about everything daily to make sure they are always happy and to make sure I'm happy and we work together.