"Birds Anonymous" is one of the many classic Looney Tunes cartoons that comes across funnier when you're an adult than when you're a kid, as you understand what it's spoofing. In this case, the target is Alcoholics Anonymous, as Sylvester enters an organization that helps cats break their bird addiction. But it's not that easy for him to think about anything other than Tweety (it's hard to deny that felines really develop dependencies on avians).
They hit it right on the nail with this cartoon. The meeting early on shows cats talking about how their bird addictions were running their lives into the ground until the organization saved them. And when the organization's rep Sam catches Sylvester trying to eat Tweety, Sam goes off on a speech about how this one snack will open Sylvester's addiction back up! I actually think that it's really good that they spoofed Alcholics Anonymous. Once, I was watching Penn & Teller's show, and they said that AA is basically a religion. Aside from the fact that a "12-step program" is a rather dogmatic idea, AA apparently hasn't changed it's modus operandi since its creation in 1935. But if AA helps people break their addiction, then it probably balances everything out.
Anyway, this is a really funny cartoon. Like I said, it becomes funnier once you're old enough to understand it (as do many if not most of the classic Looney Tunes cartoons). It certainly deserved its Oscar.