Those who are strangers in the race cannot compare to any dog ​​they know when they look at the shriveled skin of Shar-pei, and they sadly pass what the dogs are playing with their genes. When the white English Bull terrier sees his tiny wading eyes on his egg-shaped oval head, he cannot stop thinking of the same thing. These strange dogs are held by creatures produced in laboratories by those who do not know, because they have not seen them before. As if they were brought to a pund and taken out, and produced by some strange tasteful people, they are tried to be swallowed as a new and eccentric race next to the beautiful Collie and German Shepherds. Apart from the instinctive personality traits of purebred races, their physical traits serve the purpose of production. Shar-pei, the old fighting dogs of China, aimed to achieve victory with a stronger real bite by presenting their skins, which are a few tricks to their bodies, as bait to their rivals in the arena. The ancient Chinese consciously produced the Shar-pei with these physical properties. I am sure that the first examples of the race did not show such exaggerated skin characteristics. After the production goals are determined, the parents who show the desired features or are prone to these features can be used in production and the desired dog can be reached after generations. The genetic principle is always the same. Although the bull terriers were first seen in the show in 1835, although they were far from their interesting appearance today, the top winner in the 1950s, along with a dog, accepted the inclined head standard and directed the producers to produce more inclined head bull terriers. As it is believed, the bull terrier carries neither dog pig hybrid nor any other type of blood. Nature does not have an order to allow reproduction between species. The German Dog Club sets out the rule that parents have successfully completed certain tests, especially obedience, before allowing the production of business dogs (German Shepherd Dog, Rottweiler, Giant Schnauzer, etc.). Thus, the production of offspring with high working potential from proven parents is ensured. With the right training, these dogs provide the expected working efficiency to their owners. Although the German Shepherd Dog has a 100-year history, it has managed to become a versatile star of the dog world with these careful and selective production principles. According to professional producers and trainers, a good job dog is rarely "trained", but rarely "trained". Professional manufacturers are therefore of great importance. Seeing the mother and father of the puppies you receive and evaluating them as a family or business dog ensures that the puppies are brought together with the right owners and transferred to new generations by keeping the features desired to be preserved in the produced dogs. Careless production produces nothing but harm to the race. Selective production also plays a major role in the production of other pets, such as horse, cattle and small livestock. It is aimed to continuously improve the races by eliminating the weak sides within generations and strictly adhering to the features that are desired to be protected. Having a production experience with a forward-looking perspective, knowing the properties desired to preserve and eliminate with “genetic principles” are the most indisputable virtues that distinguish real producers from ordinary backyard producers.