Dipping back into that Draw 50 Famous Cartoons book, I picked out ... Baby Puss ... beloved ... character from ... uh ... well, I guess it's got to be The Flintstones then? Does anything else make sense? But yeah, this is the cat Fred tries to put out for the night and that you barely see outside the credits. I'm surprised that he has quite so many spots and that their pattern doesn't seem obvious to me; maybe that's part of why he got used to little. The Flintstones wikia --- https://flintstones.fandom.com/wiki/Baby_Puss --- only lists four in-episode appearances.

I like the little curve where his hip meets his hind leg. That feels good to draw.