Why purebred dogs are prone to carry genetic diseases

Because most purebred dogs have only a few or dozens of initial breeding dog samples in the early stages of their creation. In order to strengthen the characteristics of this dog breed Characteristics can only be chosen by inbreeding among these original ancestor dogs to obtain gradually unified and stable characteristics of the required dog breeds. And once the original ancestor of this dog breed carries genes for certain genetic diseases, it is inevitable that such genetic diseases will still appear from time to time today, hundreds of years after the development of the dog breed, because they are from the original ancestors. The genes of generations, coupled with the repeated reinforcement of close relatives during the development process, inevitably led to today's situation.

If the genetic disease comes from the original ancestors, then even if the puppy’s grandparents and parents have been diagnosed as not having the genetic disease for several generations, the puppy will still have a chance of getting it, but the probability will be much lower.

If the parents have genetic disease problems, and they are used to breed offspring, the probability of the puppies being affected is much higher. Theoretically speaking, if one parent has a problem, the probability of the puppy getting sick is 50% (of course, this is not the case in reality, it will change according to the genetic strength of each parent). If both parents have the same genetic disease, then they still need to breed My child, this is sin.

Therefore, in countries with developed dog breed associations, they have health examinations for genetic problems before breeding. Only qualified dogs can have offspring. They even stipulate that certain dog breeds with certain appearances cannot be used to breed offspring. For example, our well-known merle-colored Border Collie is prohibited from breeding two offspring of the same merle color in foreign countries, because merle color is an external manifestation of genetic problems carried by this dog breed. Once both parents are merle color, the puppies will be very large. There is a chance of suffering from a variety of genetic diseases. Of course, in China, most people don’t know about it, and it is inevitable that the probability of genetic diseases has been increased again and again, until it is now terrifying.

Examples of bulldogs with the most genetic diseases

Comparing the appearance of each dog breed now and a hundred years ago, we can see a big difference. This artificial selection and evolution process has also led to the spread of many genetic diseases. Take a typical example, bullfighting! Fa Dou is very popular now, and there are tens of thousands of them at every turn. But did you know that bullfighting is a typical genetic disease complex, which covers basically all kinds of genetic diseases. For example, with hip dysplasia (CHD), you can basically say that any bullfight will have this problem if you take it for examination; at the same time, because of its special body shape, it is difficult to mate naturally, and it is basically done artificially; because the head is too large, it is easy to have difficult birth, and it has extremely high The caesarean section rate; the average life expectancy of Yingdou is only 6.25 years, I don’t know if it is similar for French Dou.

Advantages of purebred dogs

①Stable personality

Each different dog breed has its own personality characteristics. For example, the golden retriever that Ping An’s mother knows best is a dog breed that is very suitable as a family companion dog. It is also an excellent dog breed that serves as a guide dog, a medical dog, a search and rescue dog, etc. Typical personality of the breedYes, he is calm and quiet, friendly and gentle, loves children, has high obedience, and has an extremely high IQ.

After all, as a guide dog, if a fighting dog like Castro Pit has a responsible personality, when it encounters other dogs on the street, it will first abandon its blind owner and start a fight. If it encounters someone who is unhappy or dislikes, Or if someone pisses you off, bite him first. I guess the blind man would rather go out alone than bring such a "guide dog" with him~

Another example is that the personality of this guide dog is as excitable as a small dog like Pomeranian Teddy. When guiding the dog on the street, when he encounters other dogs, he will quickly drag his owner and rush over, and then " It roars loudly "woof, woof, woof" to fight against enemy dogs, and will not give up. At this time, even if the blind owner was lucky enough not to be dragged to the ground, the "woof, woof, woof" noise would probably cause considerable eardrum damage to his ears, which are more sensitive than ordinary people.

So, personality is actually one of the typical characteristics of each dog breed and one of the purposes of breeding working dogs. Dog breeds with different personalities can perform different duties. Such a stable personality is beyond the reach of mixed-breed dogs.

Many people mistakenly believe that all dog breeds are bred and consolidated from close relatives hundreds of years ago due to appearance, but this is not the case. At first, it was basically for work purposes, and the development of appearance only appeared later.

②Stable appearance

I mentioned appearance in the previous point, but here I will mainly talk about the appearance of purebred dogs. Still taking the golden retriever as an example, because Ping An’s mother doesn’t know about other dog breeds.

First of all, let’s exclude the “golden retrievers” created by unscrupulous dog dealers in China, not to mention the golden retrievers that have too many generations in China and whose origins are unclear. Only compare those pure-blood golden retrievers with clear bloodlines and traceable ancestors for generations. For example, golden retrievers whose bloodline is very close to imported breeding dogs, or golden retrievers who look directly at dog breed competitions in the United States. Those are clearly bloodline golden retrievers that do not have the bloodlines of other dog breeds. Are their appearances similar? While an expert can tell the difference between each dog at a glance, an outsider might not even be able to tell them apart. This is the stable appearance advantage of purebred dogs.

After parents choose a purebred puppy, they can basically predict what the puppy will look like as an adult. As for mixed-breed dogs, the growth process brings more surprises from their appearance, making their owners always curious about what they will look like in the future.

③Choose according to your needs

For example, if you plan to keep a janitor, you definitely cannot choose a dog breed like a golden retriever that can get acquainted with people and help move things when thieves visit; if you plan to keep a dog to accompany your children, As a nanny, you definitely cannot choose a dog breed with safety risks like the Tibetan Mastiff; if you plan to raise a dog to train in various skills, you must choose a dog breed with high obedience.

Purebred dogs themselves have clear breed characteristics and are suitable for different responsibilities. You can choose according to your needs.selection, it is easier to choose the right dog.

Disadvantages of purebred dogs

The problem of genetic diseases can be said to be the biggest disadvantage of purebred dogs. Various dog breeds have different high rates of genetic diseases. Some dog breeds are prone to CHD, some dog breeds are prone to ectropion, some dog breeds are prone to tricholashes, some dog breeds have a high incidence of tumors, some dog breeds are prone to spondylosis, and some dog breeds are prone to the more terrifying syringomyelia...