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Cow and Chicken became pretty popular in Brazil, more so than Ren & Stimpy.
Ren and Stimpy didn't really get much exposure here because it aired at late night Nickelodeon, at which point most kids would be asleep.
But Cow and Chicken had more frequent reruns at a much more accessible time period.
So the end result is that, here in Brazil, Cow and Chicken never had that stigma of being a Ren and Stimpy knock-off, because most people who watched it didn't know what Ren and Stimpy was in the first place.