Took the buns to the new vet. They took an x-ray but other than gas didn't find anything. To be fair, he forewarned that hair is not likely to show up on an x-ray unless there is a pocket of gas around it. So they gave him a shot of antibiotics and I'm supposed to give him some laxative twice a day until he starts going to the bathroom again. So far he still has not pooped, peed, eaten, or drank anything today. I've got him on lockdown in his cage to keep a close eye on him.