Very powerful portrait Charlie. Those eyes are 'cold' indeed.
Such a sharp capture except for the blur below it's left eye. Possibly motion blur ( cats don't sit still for long... unless they have an eye on a bird... lol)
I would prefer if perhaps some 'captured' texture nearby using the 'Clone tool' in PS might retrieve some sharpness there and avoid the 'slight' distraction this causes me. This is just my opinion and the more I see this the more I am aware of the area.
Nice capture Charlie ~ Regards Melbob
Others might not have the slightest problem with it Charlie, so feel free to disagree.
