Puppies bred by crossing an American pit bull terrier with an Australian shepherd are likely to be medium-sized dogs in between the sizes of their parents. Their height may range from 14 to 23 inches at the shoulder. Their weight may range from 22 to 75 pounds.
Puppies bred by crossing purebred parents of two different breeds are not as consistent in type and size as puppies from purebred litters. They may inherit any combination of their parents' characteristics, so crossbred puppies from the same litter may have widely varying appearances and temperaments. Crossbred dogs are often healthier and longer-lived than purebreds, as they are less likely to inherit genetic disorders caused by recessive genes.