My LO has quite nappy rash at the min. Its under control though-it seems to be ok, then as soon as he does a poo it flares right back up again. Poor wee sausage is in agony when we change him His poos also smell horrible, like worse than they've ever smelt (and huuuuge). So I am wondering if it is something he is eating to make them smell and also like acidic, which could be causing the nappy rash? He is eating tonnes at the minute too. The only thing I've done differently lately is cut his formula. As of last Friday, he is now solely on cow's milk. He was having about 6oz of formula a day before that but thats finished now. Could the cow's milk be having some effect on his poops?