Update on the little one: I took my piggie to the vet today for a bladder scan. Nothing of concern was seen on the bladder scan and therefore I was offered some diagnostic x-rays for him. I agreed to it and left my beloved boy there for a couple of hours whilst they carried out the x-rays. When I went to pick him up the vet showed me his x-ray compared to a normal guinea pig x-ray. All of his tummy area was full up with poop. It was more than double that of a normal piggy. We have come to the conclusion that this may be the cause of his pain due to no bladder stones being found. We have been given 0.7 ml of Emeprid twice a day for a week (a motility drug) to see if it helps to improve the gut flora and get things moving. We hope that this will cure his pain. If there is no improvement in his tummy area we will be referred to another guinea pig specialist to see if they can get to the bottom of things. Sorry its a little long, a lot happened today. Has anyone heard of anything similar to this is piggies?