Complex sentence: The episode "Man's Best Friend" did not air in the show's original run, but it was included in the DVD release of season two, and later aired with Ren & Stimpy "Adult Party Cartoon".
Split into simpler sentences: The episode "Man's Best Friend" was produced for this season but did not air with it. It is included on the DVD release, and it aired with the show's adult spin-off Ren & Stimpy "Adult Party Cartoon".