Generally speaking, purebred dogs are physically and emotionally worse than hybrids. Most purebred dogs have some congenital defects. For example, congenital deafness in Damamachi, poodle-epilepsy, boxer-malignant tumor, Du Binquan-bleeding problems similar to hemophilia.
Purebred dogs are more prone to behavioral and emotional disorders than hybrid dogs. Chihuahuas, Yorkshire dogs and other pet dogs are often too nervous, sensitive and hyperactive. Many mastiffs, Du Binquan, German German wolfhounds are excessively afraid, and some breeds, such as Lovina, Shapi and Song Shiquan, often have hereditary aggression. Other breeds, including American cocker spaniel and golden retriever, have also begun to find this problem.
2. Hereditary diseases
Today's selective breeding has destroyed the health of dogs. In order to preserve (or exaggerate) a rare feature, breeders need to pair two dogs with similar genes. Many dogs are carriers of recessive diseases, but they pass on their genes without knowing it.
In addition to recessive diseases, selective breeding and inbreeding have maintained the characteristics that are harmful to dogs themselves.
3. The volume is too high
Mastiff Mastiff can weigh up to 200. Such an unnatural huge volume is a sign of weakness. Too much mass makes dogs prone to narcolepsy and heatstroke collapse. No matter how inactive they are, Saint Bernard and other giant dogs need to breathe for a long time to lower their body temperature. Even mild temperatures can make them collapse.
Their hearts are overburdened, and large dogs often die young because of heart failure. Great Danes, Du Binquan and Saint Bernard rarely live past the age of 9. Generally speaking, the bigger a dog is than a natural dog, the shorter its life span.
4. Unbalanced short limbs
Some dogs are normal in size and have disproportionately small limbs. These deformed legs and feet define the breed of basset hound and dachshund. The short-legged basset hound and dachshund hound were bred from dwarfism. The standard of basset hound requires that the front legs are short and thick, and inevitably, the feet begin to bend, leading to chronic elbow dislocation.
5, unnatural small
Just like an oversized dog, humans gave birth to the present two-pound Chihuahua. When the big dog struggles to breathe and dissipate heat every day, the puppy is shivering because of the low temperature.
6. Plane
We have bred many short-headed cows. The nose of AKC standard bulldog is located "deep in the middle of the eye". Doing so will cause the pathological airway to be short and twisted. Too long a soft palate can even hinder normal breathing. Short heads will shorten the life span of bulldogs and stifle the possibility that they must never stop fighting. China people are familiar with the AKC standard Beijing Ba dog, which requires prominent eyes, a wide and short mouth and wrinkles. Jingba often infects the cornea because of the friction of hair. At other times. Most dogs are blind even if they put their eyeballs back into their sockets immediately.