This may seem like a very strange request, but we do have a wonderfully diverse group of folks in FR, so I am hoping somebody knows the answer to a ver perplexing question. Our 13 year old Labrador Retriever had a serious bout of pancreatitis a few years back. We almost lost him. As a result, he is permanently on an ultra-lean diet. He is fine with it, with one exception. He doesn't get enough fiber, and when he feels fiber-deprived rolls of toilet paper look very inviting to him. The solution, said our vet, is to give him more...