Haha, that is a very familiar sight around our house. =D
My sister's dog (GSD/Husky) used to "wash" our aquariums each day really nicely with his slobber. He has been deprived of his duty lately, though, since I have yet to move the aquariums back into the living room. I might do that sometime this week so he can have his entertainment back.
Boomer is cute, despite how much of a terror he can be sometimes.