C&C per request:
Though not typical in pet portraiture, I don't have a problem with the drastic side lighting. I almost wish that the lighting had been even more from the side - the lack of catch light in the far eye is accentuated by the large catch light in the near eye.
I like the off center crop, your cat clearly seems to be looking into the frame. However, it is a touch too tight on the left. Had it been just enough wider to not crop the ear that side of the image wouldn't seem so claustrophobic.