German animal husbandry originated in Germany, so it is generally German.
The German department is opposite the American department, but it is not very popular. Currently only available in the United States.
In Germany, there are two kinds of German animal husbandry.
(1) One is the West German Shepherd (also known as Exhibition Department), which is the kind with black shell and yellow belly and bent hind legs and is used in beauty contests.
(2) The other is the East German Shepherd (also known as the Ministry of Industry, Cheng Jian), which is relatively rare, usually gray or black, and is generally used for training.
Both West Germany and East Germany have short hair. In fact, DDR, that is, East Germany, will be smaller than West Germany. Because of work, it will be a little smaller and more agile. American German shepherd's hair is a little longer and looks softer (but I personally don't like it). American German shepherd's hair tends to be a family partner and an indoor dog. I feel that I have violated the purpose of Demu as a dog breed.
In terms of area, East Germany will be smaller than West Germany, and, what can I say, uglier. .
Just classified by appearance: ① West Germany, ② East Germany, ③ American German Shepherd.
As for the hammer system you mentioned, it is the blood system of West Germany.
There are three major lineages and six minor lineages in West Germany, which are equivalent to the genealogy of German shepherd dogs at the competition level (I won't expand the details, please ask me if you are interested, and I'll tell you).
However, the hammer system is not the blood system, but the blood system of the folk German shepherd, which is popular among the people now. This blood system is characterized by big head, big head and hanging cheeks. For true race-level bloodlines, the hammer system is rubbish. (Forgive me for telling the truth)
In order to give an intuitive impression of the building, let me look at three photos of German shepherd dogs.
This is DDR in East Germany, used for training.
This is West Germany, 07? 2008 champion
This is an American German shepherd. Look at it gently.
If there are any questions, I can answer them again.
The words on it are hand-coded, which should be detailed enough.
Hope to adopt