User blog comment:D2r/Unanswered Questions of Redwall/@comment-99.98.209.91-20110417032601/@comment-1479469-20110421200029

The geographical changes...hmm. That IS true. I'll look over my books and see for myself; I might add it to the list. As for pollen flour - I assume that IS (was?) Jacques' explanation, but you're right that no provision of milling the flour is mentioned, so there's still a logical gap.