- The American Pit Bull Terrier (APBT)
- The Staffordshire Bull Terrier (SBT)
- The American Bulldog (AB)
These three bloodlines have been interbred for centuries to create a variety of different pitbull breeds. some of the most common pitbull bloodlines include:
- The Red Nose Pit Bull
- The Blue Nose Pit Bull
- The Black and Tan Pit Bull
- The Merle Pit Bull
- The Catahoula Pit Bull
- The Bulldog Pit Bull
- The Dogo Argentino Pit Bull
- The American Bully
- The Staffordshire Bull Terrier
- The American Bulldog
- The Bandog
- The Razor Edge
- The Gascon Saintongeois
- The Beauceron
- The Boxer
- The Bulldog
- The Dalmation
- The Doberman Pinscher
- The German Shepherd
- The Great Dane
- The Greyhound
- The Labrador Retriever
- The Mastiff
- The Newfoundland
- The Poodle
- The Rottweiler
- The Saint Bernard
- The Siberian Husky
- The Weimaraner
Each of these bloodlines has its own unique characteristics, such as size, weight, coat color, and temperament.