User blog comment:Gabool the Wild/Redwall Fatties/@comment-1669318-20100607023635

They eat alot of fresh fruits and veggies too, so that probably helps. And also, they are limited in their medical technology, so the life span is shorter, and there is less time to develope diabetes. Anybeast who developed diabetes anyway would likely die quickly, as the Redwallers don't have the technology to diagnose it, and the death would be attributed to old age. Diabetes is also influenced by genetics, and since any charecter with diabetes will probably die, the genes won't get passed on.

About the toilets...out of all the books I have ever read, Watership Down is the only one that mentions that sort of thing. It doesn't usually make good story material.