Like all other dogs, American Pit Bull Terriers and Poodles are members of the species Canis lupus familiaris, and can produce healthy puppies when bred together. Since the breeds are so different, however, puppies produced by this cross will vary considerably in appearance.
Puppies produced by parents from two different pure breeds can inherit any combination of the parents' traits, making it more difficult for a breeder to produce a consistent type. The usual reasons for crossbreeding include combining desirable characteristics from both parent breeds and reducing the chance of transmitting genetic disorders caused by recessive genes. Crossbreeding over generations can lead to the development of a new breed, but this requires the establishment of a breed club and the acceptance of one or more major kennel clubs.