Difference Between German And American Rottweiler. German dogs consist of natural and long tails rather than american dogs because the german club has banned the cutting of the rear of the rottweiler during 1999. A more subtle difference is in their size.
German rottweilers are slightly larger with a broad head and docked tail, and are stronger while american rottweilers are smaller with a narrower head and less strong than german ones. So, a german rottie is born in germany while an american rottweiler puppy is born from german rottweiler parents or ancestors living in america. The adrk (allgemeiner deutscher rottweiler klub) is the german equivalent of the akc (american kennel club).