This is actually an old saying in rural China. Cats and dogs are free-range in large families or houses in rural areas, so the nature of animals is more easily reflected. Dogs are used to marking their urine every time they go to a strange environment. This habit is also inherited from their ancestors, so dogs know their way very well. Even if sometimes the dog runs far away and can't find the way home for a while, it can find the place it has marked through its sensitive sense of smell and walk back bit by bit along the familiar smell, not only by memory, but also by sense of smell and sensitivity to urine, so the dog can always find the way home.

Compared with dogs, cats are more suitable for home. It takes a long time to adapt to a strange environment. Even in the backyard of the countryside, cats don't go too far. It is always familiar with the place where it grew up, not only with its familiar smell, but also with its familiar environment and owner, as well as its neighbors. Familiar environment can make cats feel happy, cheerful and relaxed, and their appetite and sleep are good. If you suddenly put it in a strange environment, the cat is a very neurotic animal, which is prone to stress, and stress will cause many diseases.

Although the cat is timid and easily stimulated by the outside world, it only recognizes its own home, which is the most familiar environment. In foreign countries, cats are abandoned far away, thinking that they can't come back. Miraculously, when the cat ran around for a long time and appeared in front of the house full of dust and dirt, the owner was shocked and excited. At that moment, the owner decided never to be separated from the cat again.

The old saying is mostly free-range cats and dogs. In today's modern society, many cats and dogs exist as family pets or companions. They live in high-rise buildings or apartments and villas. Dogs going out for a walk every day will help them identify some directions. Cats stay indoors 24 hours a day, and some natural characters or abilities may have been erased.