In fact, the reason why people have this idea is actually related to some books in the past, such as the Book of Changes, which is recorded in it. Dogs can't last eight years, and chickens can't last six years? It is because of the records in these ancient books that people think that once the age of chickens and dogs exceeds this time, they will undoubtedly become monsters. From our present point of view, this explanation is completely nonsense, because it is basically different from this situation, except that hens generally live for a long time, and cocks are usually killed in a few months because they want to lay eggs.
No more than eight dogs? In fact, it is mainly related to a story in Yi Yao, because in ancient times, a landlord kept a white dog and loved it very much. He took it with him wherever he went, but he died for physical reasons. As a result, he didn't expect that the dog disappeared after the landlord died, but at that time, because he was in a state of grief, no one cared about the disappearance of the dog. As a result, he didn't expect that the landlord would come back a year later. Moreover, it is said that a Taoist priest used a spell to restore his sunshine, because his behavior was no different from before, so people believed these words, but they didn't expect that once they slept in a chair because of drinking, they revealed their true colors, which turned out to be the appearance of a white dog that had disappeared before, so people knew that the dog had become a monster.
In fact, this sentence is more of a feudal superstition, because in the past, people firmly believed in the existence of ghosts and gods, so the existence of natural monsters is also reasonable, but for us now, in fact, such a thing is like a short story, and we will be happy after reading it.