The last time I was visiting Dru, she called me over to ask for help.
She said, "Would you take this brush and put cornstarch on Branwen's rat's butt while I hold him?
I said, "Sure!"
And I did exactly that.
This is Bilbo and his back legs don't work...so he gets a little moist in his boy-bits, hence the cornstarch.
photo by Drusilla Kehl