Well I ended up going through the search history on my family's iPad. Although it's mostly used by my younger brother. Anyway there were searches for "furry fursonas" and "furry coyote". I looked at the searches and it was all either ref sheets, sfw drawings, and fursuit pics. Right now he doesn't know I'm a furry so the fact that he's discovering it on his own really surprises me. I think I'm going to drop some hints that I'm also a furry to him since he probably won't want to talk about it at first.