Update again...so we did an enema and a light soak for about 15 minutes while still at vets this am. I then brought him home and he was put on cisapride orally once a day. He got his meds. As of an hour ago still no poop. My gut is telling me there is something else going on here, but I just don't know what. If he doesn't poop by Monday, I will call the vet back. The x-rays showed that his bone density looks great. Anyone have any other thoughts/ideas??