If our little one has had pebble like poo's, I give him 30mls of water mixed with one teaspoon of brown sugar and it works wonders. On our information brochures we got given from the hospital they say continue with the brown sugar until poo is back to normal, but I find only one dose is needed. I give it to him after his feed, so it also helps with bringing up his wind. It was recommended to us by midwifes and the parent help line