Hi, I have a child who is nearly two. His poo was very runny and smelly, sometimes almost like water. He constantly has nappy rash and is very tender to wipe. His sister has been diagnosed with ceoliac disease but even though he has been tested twice for this disease, his tests have come back negative. I feel there is something not right so I have taken him off wheat to see if there was any improvement (3 days ago) and now his poo is very chunky (but better formed and not as smelly) and undigested.