I had been meaning to ask this too, as we too have on the odd occasion used our "low fat" milk on DD's cereal - but most of time is full fat. She is a massive eater too, but only 2 BF's a day so I do try to make sure she gets enough dairy as well. More often in this house is me having her full fat milk than vice versa though - although I read somewhere recently about a study where full fat milk was thought to protect against heart attack or stroke - so that is what I am telling myself anyway :-)