For about a month his once a day poo has been so revoltingly smelly and sloppy most days. First occasion it coincided with a tummy bug going round the family. When it continued I wondered if it was because he'd drank lots of water at the swimming pool. Now I'm wondering if it's something he is or isn't eating. He's 2 1/2 and eats no vegetables, 3 portions of fruit a day and an otherwise fairly balanced diet. Could it be lack of veg causing this?