We only do rescues now also - which is why I am not sure exactly what mix ours is. We also had a greyhound we had to put down Thanksgiving morning this past year. He was a former racer that we rescued after he broke a leg and lost a step.
This is Jeter - he was still the fastest dog in the dog park. It was quite an experience bringing him home. He had never done steps before, never seen a mirror and it took a while until he realized that he could trust people. Turned out to be a great dog, but there were some both rough and entertaining moments in those first few months.