Our Ayla's butt swelled up about 3 weeks into bringing her home initially. She went to the vet immediately. She was 10.5 weeks old and the day before she got down inside the couch with her experienced older sisters. Being so young, I thought she might have swallowed some foam from the couch. Dr. Williams agreed. I gave her an inch-inch and a half of Petromalt daily to help pass anything that was gathered there. The morning that I discovered her bum protruding and blood red I rushed her over to the vet and he said that she had some kind of intestinal infection and treated it with antibiotics. He even took her temperature (ouch) and she was running a fever. After returning home, I was still leary that she might have ate the foam so I contacted Dr. Williams. So in addition to the Petromalt, she had the antibiotics and within 3 days it was cleared up. Michelle [Posted in FML issue 1126]