I like this picture The highlights didn't blow (except maybe a tad on his front right paw), the color of the fur works great with the environment. The eyes stand out beautifully with great focus contrast and color contrast. The framing pretty good, I might suggest (if you cropped) allowing the front right / bottom left paws to be in the frame a bit more. Even though this scene has somewhat busy environmental elements, I think you've hit a good balance between an interesting environment, without overpowering the subject. There is a bit of gold on the far left of the image, and a bit of green between his legs that if removed/desaturated might help the image a bit.
He's a bigun alright! Beautiful though, I love the expression on his face. Did you just tell him to get off your chair or something. He looks like he's ready to rumble.