Hey guys, long time pitbull owner and lover, I also come from a family of past breeders. I have gotten into a heated argument with another pitbull owner about what a red and blue nose is. I have always been under the impression they are just lineage's of ABPT and are in fact pure blood lines of pitbulls. Basically like the same concept as gold, black, and chocolate labs. Am I wrong or partially right? Give me some good information on this please. Thanks in advance to everyone who helps me out with this dilemma.