The eyes are off, along with the front left paw. The back legs are off, if you're looking for realism the whiskers are too dark and the muzzle looks like you just took a tire to his face. The hair completely ruins the picture alone with the right ear. The tendrils are sloppy. ~ Bad critique.
I absolutely adored the front paw and it leaves me in incredulity of how you did that. The tail is done nicely, along with the hind feet. The shining on his arms and legs are nice. That's about all I have to say, so I'm done now.