Puss N Boots N Babies


I'm just wondering how did the people who worked on the episode create the live action kitty in the cartoon background? I know this would have been before digital production. So did they use a blue screen where the kitty was (kind of like in Roger Rabbit).

Here's the first part of the episode for those who haven't seen it:

http://www.youtube.com/watch?v=1T9N22c-pb8

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