Part the first; Empty pizza box! Remove the bottom liner so there's no cheese residue, only a bit of flour here and there. It still smells yummy though, and is made from very tough cardboard.

Part the second; Fill pizza box with timothy hay/alfalfa/veggies/various treats. Close securely.

Part the third; THROW TREAT-FILLED BOX TO THE WOLVES BUNS.

My rabbits have a new favourite toy.