How many different bloodlines are there?

Too many to list. Watch out for are people without papers proudly proclaiming "gator, red nosed, blue nosed, etc." These are just made up as a selling point for BYBs. True bloodlines, well you can look at your dog's pedigree and determine that. Colby and Cooper bloodlines are the early bloodlines of the breed making the Colby the oldest known bloodline. Many bloodlines comes from them so don't worry about the bloodline if it is a real pitbull.