First, China's garden dogs are genetically superior to pet dogs. Rural people never interfere with the mating of dogs, so garden dogs in China are basically hybrid dogs, so it is difficult to show the genes of invisible diseases in dogs.
On the other hand, in order to get purebred dogs, pet dog owners usually mate with dogs of the same breed, so inbreeding can easily expose recessive disease genes in dog genes, so the disease resistance of pet dogs is not as high as that of China garden dogs. It is a truth that children born after close relatives get married are prone to deformity and illness.
Secondly, China's garden dogs live in a better environment than pet dogs. Most pet dogs live in cities, and the urban environment is seriously polluted. If a pet dog lives in such an environment for a long time, its disease resistance will definitely decline. On the other hand, garden dogs, living in rural areas with good environment, can not only breathe fresh air every day, but also have fun and exercise everywhere, so their disease resistance is naturally getting stronger and stronger.
Third, China garden dogs eat healthier than pet dogs. China garden dogs eat leftovers. Although these things are not as delicious as dog food, they are natural, healthy and pollution-free food. Dog food eaten by pet dogs contains many chemicals such as pigments and preservatives. Eating those things for a long time is definitely bad for your health.
From these three points, it is not unreasonable that the disease resistance of garden dogs is stronger than that of pet dogs, so I suggest that you consider raising a Chinese garden dog when raising a dog, so that you can have less trouble.