In that last picture, he almost looks a little like a Rottie.
Yeah, I think he may be part Rottie, but what do I know? That would explain his muscularity, though. When I first posted some pics of him on here, some people thought he might be part Pit.
The vet I take him to said he's probably mixed with a rare breed of hairless Mexican dog, known as a Xolo. LOL. That would explain the super short hair.
Whatever it is, I love the result. His hair is very short and smooth. It almost looks like black skin. I wish there were some "expert" that could clear up the mystery for me. I'm just curious.
Thanks all for your comments.