@coolboymew
Let me help with that: There were two Ren and Stimpys. The original in '91, and the adult version in '03, which was essentially direct to DVD.
@coolboymew
It got three episodes on Spike TV before getting canned. The rest of what was produced (another three) was only released on DVD.
So it was half direct to DVD I guess.
Rubber Nipples appears to be from season 2 of the original show so you were right on that. No clue how that made it past standards and practices tho.
@coolboymew
Does this thumbnail look like the western bit you're after? If so, it's the same episode.
@coolboymew
Googling for it reveals that the song is at the end of the episode.