"Written by Robert 'Triumph the Insult Comic Dog' Smigel, it featured a corporate mascot for the 'Cluckin' Chicken' restaurant: a chicken who gets his head chopped off. The severed chicken head continues to sing the praises of the restaurant, going so far as taking a bite of his own roasted body and declaring 'mmm! I'm delicious,' until at last he expires from loss of blood.
"Unable to find but available on SNL 25th Aniversary DVD." Link