User blog comment:D2r/Unanswered Questions of Redwall/@comment-1399757-20110213144312

@19: If they ever did need to... you know [you may note that the characters never need to do this in the series] they can go in the woods. Also, strawberry leaves [and I'm sure there are many other plants] can be used as a sort of makeshift soap.

As for the galleys - they have portholes don't they?