Looks like a dog with a deformed head. The teeth don't look like dog's teeth though, and they don't even look like a carnivore's teeth to me.

I've seen wolf-dogs and coy-dogs, and they pretty much look like wolf-dogs and coy-dogs.

Could be a mutation, could be a creative assemblage of parts, could be a PhotoShopportunity. I hope I hear what the final analysis is after the experts look at it.