Rick’s drawing

Hi Matt- 

So I got roped into doing a dog portrait for my brother’s dog that passed away last month. 
This was my third attempt at it, as the dog was black and the photo references were all terrible! Somehow this blurry photo was the best they had…
I’m close to calling it done but I know you can give me some tips before I ship it. The eye needs work and the hair on his muzzle, but I’m not sure what to do. 
thanks! Rick