My son is two months old yesterday and I just recently returned to work. My grandmother is keeping him and she said he is eating 4-6oz. every 2 hours. I can believe the 4oz. but 6! When I'm not working he nurses every two hours for about 15-20mins. I am ok with him eating that much if it takes that to get him full but I don't like the thought of over-feeding him. All advice is appreciated in this matter.