Has anyone else experienced their little one developing renal colic? My little boy started peeing blood a week ago. We contacted the GP and he was put on antibiotics for a query urine infection even though he had no temperature. Two days later he started passing bits of what can only be described as gravel in his urine. Again we went back to the doctor who saw described gravel and he has been diagnosed with a kidney stone. Just curious if anyone else has experienced the same. Baby was only 15 weeks old.