Well he is just HIM.
With that said, I do see the longer length of the nose and the hair is not yorkie (IMO). I think he does have some doxie in him. Not sure if they still do or not, but PetSmart used to sell the DNA kits..they were like $100 or so.
My boy, Shelby-Dale, was sold to us as a bi-black sheltie. He obviously has something else in him. Many believe border collie..I lean towards lab. I've threatened to do the DNA testing just out of curiousity. I haven't yet. Bottom line is..he's MY baby boy and it really doesn't matter. Must admit..I am very curious tho..so I may still one day. Just not $100 worth of curious I guess hehe