Here are a couple more Nip & Tuck similarities to Oz. The first image shows Nip & Tuck visiting the wife of Peter Pumpkin Eater in her pumpkin shell. The second is John R. Neill's drawing of Dorothy, Button Bright and friends visiting Jack Pumpkinhead in his pumpkin house from The Road to Oz. There are a number of differences here, but something about the way Dingleberry and Toto are both looking in at the door is pretty cute.
Another amusing (and slightly disturbing!) image below shows a set of piglets that look very familiar - here we see eleven, but they certainly look like they're related to the nine tiny piglets from Dorothy and the Wizard in Oz (shown on the right).