Rocket, I am not sure they were asking about the fandom per se, but the case where anthropomorphic creatures did actually exist, would pure breeds exist there?
And for the record... my character is a simple pure breed GSD. And in no way does that mean I am against intermingling of races IRL. In real life I am from about 9 different "strains" so far as I know. BUT, I do like how some pure breed dogs and cats look, so ... I do wonder if in a real anthro world, if furries would also like that and breed just to make novel coat patterns, or such. Or breed for strength and other traits so the offspring have a better chance of getting a certain job. Others might breed to be indistinct so as not to gain attention.
OR, maybe purebred furries in this fake world would actually be against the rules and looked down on, so like anti-snobbish.