The German Shepherd Dog used to be considered a strong, athletic, and highly capable working dog. According to the 1915 book "Breeds of All Nations," the breed was originally medium-sized and weighed around 55 pounds. These dogs were known for their ability to perform physically demanding tasks, including jumping high barriers and working long hours. Over time, however, selective breeding has dramatically changed the German Shepherd’s physical structure. Modern German Shepherds are often much larger, weighing up to 85 pounds, and have developed sloped backs, barrel chests, and exaggerated body angles. These changes were made based on appearance standards rather than function. These exaggerated traits have led to serious health problems. Many modern German Shepherds suffer from poor mobility, weakness in their hind legs, and conditions like ataxia. The breed has lost much of its original athletic ability, showing how breeding for looks can negatively affect a dog’s health and performance. Desired traits originally included strength, agility, and endurance. However, modern breeding has shifted focus toward appearance, which has introduced defects and reduced overall health.
Grandparents: Strong working-line German Shepherds (1915 type, athletic, medium size) Parents: Larger, show-line German Shepherds with sloped backs and heavier builds Offspring: Modern German Shepherds with exaggerated body angles, reduced mobility, and increased risk of health issues
The English Bulldog is one of the most extreme examples of how selective breeding has negatively impacted a breed. Bulldogs have been bred to have very large heads, short legs, and extremely flat faces. While these traits may be considered desirable in appearance, they come with serious health consequences. Bulldogs suffer from a wide range of health problems. According to research, they often experience breathing difficulties due to their shortened airways, making it hard for them to regulate body temperature. They also commonly suffer from joint problems, skin infections, and heart issues. One of the most serious problems is that bulldogs are often unable to reproduce naturally. Their body structure makes mating difficult, and many require medical intervention such as artificial insemination and cesarean sections to give birth. A study by the Kennel Club found that bulldogs have a median lifespan of only 6.25 years, which is significantly shorter than many other breeds. Originally, dogs were bred for function and survival. However, in the case of bulldogs, breeding has prioritized extreme physical traits over health, leading to a breed that suffers from nearly every possible disease.
Grandparents: Early bulldogs with more balanced proportions and better mobility Parents: Bulldogs with shorter snouts, heavier bodies, and increased physical exaggeration Offspring: Modern bulldogs with extreme features, breathing issues, limited mobility, and reliance on medical intervention for reproduction
Over the past 100 years, dog breeds have undergone major changes due to selective breeding. Instead of focusing on health and function, many breeders have selected traits based on appearance. This has led to extreme physical features that often harm the dogs. For example, shorter faces in breeds like bulldogs and pugs have caused breathing difficulties and overheating. Larger body sizes and altered bone structures, as seen in German Shepherds, have reduced mobility and caused joint problems. In some cases, dogs have developed genetic defects that can even lead to paralysis. The article "100 Years of Breed Improvement" argues that these changes are not true improvements. Instead, they show how human preferences have created unhealthy animals. Breeding dogs for exaggerated features has resulted in increased disease, reduced lifespan, and lower quality of life. Overall, while selective breeding can produce specific traits, it has also caused significant harm. True improvement should focus on the health and well-being of the animal rather than appearance.
Dog pedigrees help track inherited traits, but they also reveal the consequences of selective breeding. While breeders may aim to improve certain features, focusing too much on appearance can lead to serious health problems. The changes seen in breeds like the German Shepherd and English Bulldog show that not all breeding practices result in true improvement. Understanding pedigrees and the history of these changes is important for promoting healthier breeding practices in the future.
100 Years of Breed “Improvement” — Caen Elegans (2012) https://dogbehaviorscience.wordpress.com/2012/09/29/100-years-of-breed-improvement/