Kind of an obscure dog breed, the Laboreiro. Hard to find good pictures of them on Google. I've never heard of them before tonight. Some kind of shepherd-type dog from Portugal.
The Wuffy suggested I try drawing one. I think one of his friends has one. They seem to be good, Labrador-esque dogs, but the sunken eyes give them a slightly threatening appearance.
I think this looks pretty much like a Labrador, honestly. :P