Yeah, that's Black Dog. I don't have a lot of pics of him but here's another with a coupla his run'n buddies.
I found him at a construction site where I was working during the christmas of '03. After a week of watching him run the neighborhood, I found him building a bed in some moldy straw next to a dumpster. I took him home after that. We tried several different names...he wouldn't obey...I was about at my whits end when I said something...Black Dog....he reacted...and started obeying. It wasn't that difficult to train him after that. Wish I'd a got him as a pup.