Up until about 1 week ago my 19 month old drank about 4oz of milk in the morning and about 5-6oz in the evening. He is now refusing both bottles. He eats everything and very well so my hunch is that I shouldn't be worried and I am sure he is getting all the nutrients he needs from 'real food'. However, I keep reading that toddlers of this age need 12 oz of milk a day. Should I be worried?