There was a mix actually, a lot of users would say they weren't furries. I can't guess the proportion
To me, the fact that r/zootopia was the biggest Disney movie subreddit and never stopped growing is entirely due to it having an umbilical cord to the furry fandom. You can also say that the Zootopia fandom was a good place for normies that were too straight to be furries, and you can say that the Zootopia fandom was step 1 of the pipeline that leads to owning a fursuit and a canine butt plug. All three were probably true.
I just realized i typed this whole comment in past tense, but uh, the Zootopia fandom still exists. And r/zootopia still exists. I don't know i don't have object permanence