At the beginning of the film, Bugs Bunny appears on top of the Warner Bros. logo as if he was in a Looney Tunes cartoon. Also, at the very end of the film, after the credits, Porky Pig says "That's all Folks!" as in a cartoon. In both cases, Daffy Duck attempts to steal their thunder, only for the animating staff to torment him into not sticking his beak in anymore.
Daffy Duck looks onto the screen and comments on the length of the credits, saying things like "Long, isn't it?", "Patently ridiculous!", and "You're still lurking about? Don't you people have homes?".
Since Porky doesn't appear until after the credits, he is not credited with Bugs and Daffy in the "Voice-Overs" section of the cast credits.