If you saw the movie "the lion and the Wind" Teddy Roosevelt asked for a disecated Bear. The designer presented him a bear just like you presented it here, like a cow. Try model the bear standing and agressive. The texture looks OK, because fur is very complex. Probably scanning a photo of a polar bear will help. Working on it with photoshop or else (needs brillance) will help. Also the bear's face needs more accurate handling (jaw and the area between the eyes and the nose). Easy is to say it hard is to make it. Your work is good.