One thing about Warner Brothers cartoon packages on Teletoon Retro is that they provide kind of a historical overview of how cartoons have been cut up at different times. Warners' Canadian distributor doesn't like sending out uncut, complete cartoons if there's a "Bugs Bunny and Tweety Show" or "Road Runner Show" tape available, but at least that provides a chance to see what was considered offensive at different times.
For example: in the "Merrie Melodies" package from the '90s (being run alternately with the "Merrie Melodies Show" from the '70s), all gun gags are cut out by means of freeze-framing, so in "Hillbilly Hare" or "Duck! Rabbit, Duck!" they just freeze-frame on Bugs while the shots occur offscreen. But that same package from the '90s included "Caveman Inki," because the Inki cartoons were not yet considered taboo for TV viewing. But Warners left "Caveman Inki" out of the package of "Porky Pig Show" cartoons they prepared for Teletoon (the only package of uncut cartoons, and that only because the '60s "Porky Pig Show" tapes don't exist any more), because they substituted black-and-white cartoons for any color cartoons that they had marked as potentially offensive.
And, of course, the "Bugs Bunny and Tweety Show" is like a primer on what networks considered to be unacceptable. For comparison purposes, here's "Big House Bunny" complete:
And here's a version that (I think) used to run on network TV, where fully one-third of the cartoon is cut, eliminating all the execution gags.