I was so furry in highschool it was a wonder nobody mentioned I was one. I mean, I draw anthros all the time. I'd make videogame characters and 50% of them were non-human, and on top of that I had a series of comics staring anthros. And I drew ungulates the most and people found that a little odd that my favorite animals are deer and antelope. I've also mentioned things like that the impala was my alter-ego, had a belief that you can be an animal in heaven if you want (coming form a Christian private school), and even said once that it would be cool to have a tail in a middleschool science class. Everyone laughed and took it as a random thought heh.
So yeah, whem I look back I'd say I was pretty furry without even knowing it.