There is only 1 blue dog that I have ever seen that I would consider a pit bull, and she is on our flyball team. She was a rescue (her owner left her, as a 7 week old pup, alone with his other 2 dogs and they broke her jaw), so her lineage is unknown. She's the epitome of what an APBT should look like, is amazingly athletic and has very nice muscle tone. She's more blue fawn than completely blue. Other than that, I've never met a blue dog that I would ever consider and APBT.