The age of breeding "improvements" of pure breeds has transformed once-healthy dogs in deformed animals. A source There is an opinion that purebred bred dogs have special properties and generally look more beautiful. But recently on the Internet there were photos from the book of 1915, V.E. Mason "Breeds of all nations" clearly demonstrating how in the last century the species of all known breeds of dogs has changed. It is clearly seen how the age-old selection work on the "improvement" of rocks adversely affected the appearance and health of thoroughbred dogs. ![k-chemu-priveli-100-let-selekcii-porodistyx-sobak_9-600x222.jpg](https://steemitimages.com/DQmUgnc7NX45GjcHGWXykN57k6fwJ6tJPNxHieXf6RTsCEB/k-chemu-priveli-100-let-selekcii-porodistyx-sobak_9-600x222.jpg) The Bull Terrier was a beautiful sports dog. Without an ugly muzzle and a pendulous abdomen. The new shape of the skull has led to problems with teeth and progressive deafness. In addition, the dog has a congenital elbow dislocation and frequent sunburn. ![k-chemu-priveli-100-let-selekcii-porodistyx-sobak_5-600x233.jpg](https://steemitimages.com/DQmXm4bLaraJ7PDsstsefMQNYWZnxTgdPxQmed8ZbPJZp9q/k-chemu-priveli-100-let-selekcii-porodistyx-sobak_5-600x233.jpg) ven a German shepherd, which was often the standard of a "real" dog, is degrading. The book "Dogs of All Nations" describes the standard of 25-30 kg. Today it is a heavily weighted dog. From here immediately problems with the spine and hind paws. Dysplasia of the elbow and hip joint, disease of intervertebral discs, lameness. ![k-chemu-priveli-100-let-selekcii-porodistyx-sobak_2-600x183.jpg](https://steemitimages.com/DQmciHUc9t7U9MfUL4Sc9tFXo8vwNMhQNQohoaGpH7FyhmR/k-chemu-priveli-100-let-selekcii-porodistyx-sobak_2-600x183.jpg) The photos show how strongly the proportions of the legs and the body of the animal are violated in comparison with the past, which means a greater risk and susceptibility to diseases of the intervertebral discs. At the rate of hind legs decreased, which immediately gives problems with the legs and spine. Dachshunds are much faster to gain weight. Problems with intervertebral discs can make a dog cripple.