Hey there! Werebears sound like a pretty furry inclusion to me, I say go for it!
For posterity's sake, since I'm sure you wont be the only one with a question like this, here's a broader answer. Nailing down what furry enough means includes defining what exactly furry is. You'd be hard pressed to find a definition that everyone agrees on, so instead, ask yourself this question. Would you label your own work as furry, or would you recommend it to an audience of furries? If so, then I'd say its furry enough.