Cheese Belongs to You, written by Alexis Deacon and illustrated by Viviane Schwarz

Of course, there Rat Law also has exceptions...
Things escalate and bigger, stronger, hairier, dirtier rats emerge to claim the cheese. Of Rat Law, Schwarz says "You'll get the hang of it. But who gets the cheese? Buy book, find out!"
Just in case you were worried, community and civility does win out in the end. Schwarz's soft, pencil drawings and the photo of a wedge of Swiss cheese are balanced and bolstered by the bold face type of Deacon's text. The tension builds, the adjectives mount and the rat population increases in a way that kids will LOVE. I guarantee this is a great read-out-loud! Also, be sure to keep your eye on the first little rat with the bow-tie on her tail!
Also by Deacon and Schwarz:
A Place to Call Home, written by Alexis Deacon
Viviane Schwarz's other amazing, fantastic books you should read!!