Did you hear the one about the cowboy who bought a wiener dog? You could say he got a long little doggie…A vulture is in line at the airport to board his flight. TSA agent approaches and says "You can't board an aircraft with that!" pointing to the rotten dead possum the vulture has under his wing. Vulture replies "But it's just my carrion."
(Yeah, I know. But at least it's a clean joke.)