DS2 13mo has for the last few days been 'passing' completely undigested food. He's well, sleeping ok, no signs of teething so don't know if theres something wrong, or if it's normal. Usually he only does one dirty nappy a day, for the last few days it's been 4/5 times a day, bit like diarrhea, but with some undigested bits, seeds (from bread), raisins, carrots, peppers. Completely whole, should I taking him to a doctor??