If you consider yourself in anyway (Body, Heart, Soul, or Mind) to be an animal, you might be a Furry... And likely are. (I'm a Wolf in a Human body with a Human-like mind)
If you got a special bond (not that way) with an animal, you might be a Furry... Or a telepath...
If you make a sound so similar to a dog's that others turn and ask, "Where's the dog?", you might be a Furry.