Lovely picture! The fox is my favorite animal, and my main RP character is a vulperian (similar to yours, but with a human face and torso). Her pose is calm, relaxed and natural, not stiff. The view out the window behind her gives us an idea more or less as to what kind of music she is playing on her violin. The light shading and lighting add a sweet, delicate touch to this. Thumbs up to you!