Blood-vessel cancer (much more likely); Elbow joint disease (much more likely)7,8
Class
Companion
Watchdog
Which suits you
Size
The German Shepherd is much larger: about 38 kg (84 lb) as an adult, against 20 kg (44 lb) for the American Pit Bull Terrier.
Temperament
They differ most on affection (American Pit Bull Terrier: a lap or leaning dog; German Shepherd: affectionate on its own terms) and on independence (American Pit Bull Terrier: cooperative, with its own ideas; German Shepherd: keen to work with you).
Alike
Both are rated the same on activity: needs lots of exercise.
Neither is the better dog in general. Which suits you depends on your home, your days and the care you can give.
Breed explains only about 9% of how individual dogs differ in behaviour9. Meet the dog. A good breeder breeds for temperament as well as health, and matches each puppy's personality to the right home10,11.
Puppy growth
Reference curves · both sexes
Summary
Detail
The German Shepherd grows to the heavier adult, about 38 kg against the American Pit Bull Terrier's 20 kg.
Expected weight in kilograms, both sexes: each breed's adult weight grown along the 15–30 kg band of a WALTHAM growth standard12 and the 30–40 kg band of a WALTHAM growth standard12.
Barry et al., 2025. Epidemiology of haemangiosarcoma diagnosed in dogs under primary veterinary care in the United Kingdom: Frequency and risk factors. CC BY 4.0. ↑