When released on DVD, some of the episodes were edited versions due to Paramount using the master copy tapes from the Spike TV network.
The episode "Out West" was cut in the UK DVD releases because "hanging is presented as comedic, fun and risk free". The cut (which lasts 3 minutes and 2 seconds) was needed to get any rating in order to agree with the law.
Many of the "edited" episodes were restored for "Ren & Stimpy Adult Party Cartoon" (2003). There, they're labeled "digitally remastered classics."