This is beautiful. It would have scored at least an 8 from me if he was not missing the tip of his ear. As it is you are still getting a nice 6 from me. Great exposure and nice soft light. Woof!
I think I would not have cropped the tip of the ear off but I really don't find it that distracting. Perhaps needed a reflector or something to lighten up the dark muzzle a bit, detail there seems lost, but you really captured the dog in a nice pose