The Fairly OddParents S07 E24 Chicken Poofs

Poof has the contageous Chicken Poofs disease that turns him into a chicken, and everyone he sneazes on turns into chickens as well. He then flees from the hospital, and Timmy and Cosmo try to catch him before he infects all of Dimmsdale while Wanda and Dr. Rip Studwell search for a cure.