Apparently, this is what my dog is called! I always thought he was a lab/greyhound mix until someone from a greyhound rescue club told me otherwise. He is indeed what I always thought him to be, but he now has the official title of Lurcher. It's not a recognized breed but the name given to many sight hound mixes. They're very common in the UK but rather unusual here in the states.
Here's a more recent picture of my pal. He's getting really grey around his muzzle :( He's enjoying his favorite place in the whole wide world--the lake. He loves to swim.
They say greyhounds just go until they drop and I hope that's what he's going to do. He's always been VERY active. A joke I make about his mixed heritage is that he retrieves things (Labrador retriever), very quickly (Greyhound)!