Western Animation: Birds Anonymous

Birds Anonymous is a 1957 Looney Tunes cartoon starring Sylvester the Cat and Tweety Bird. In this animated short, Sylvester is chasing after Tweety as he always does, when he is interrupted by an unnamed cat (later retconned into "Clarence" in Looney Tunes comics) who brings him to a group called "Birds Anonymous" which consists of cats trying to kick their bird habit. Sylvester pledges sobriety, stating that "birds are for the birds," but falls off the wagon and chases after Tweety again. His sponsor tells him that cats and birds can live together in harmony, and kisses Tweety to prove it — whereupon the sponsor also breaks down and tries to eat Tweety. This time Sylvester intervenes, and the short ends with Tweety saying "Like I said before: Once a bad ol' puddy tat, always a bad ol' puddy tat!"

Winner of the Academy Award for Best Animated Short Film.