Mel Blanc, speaking as Tweety Bird, did not say Tweety's most popular quote, "Ooh, I tawt I taw a putty tat!", in four cartoons. First, Snow Business (1953). Second, Heir-Conditioned (1955), is a ten second cameo. Third, The Last Hungry Cat (1961). Fourth, The Jet Cage (1962).
The title "The Last Hungry Cat" is a riff on The Last Angry Man, the title of both a movie (1959) and the novel (1956) by Gerald Green that the movie was adapted from.
"The Cane Murder" is shown on a poster. This is a spoof on "The Caine Mutiny," a film based on the novel of the same name.
One of the few times Tweety is shown flying.