First, the growth cycle of old hens is long. Chinese medicine believes that the four seasons of heaven and earth are full of qi (a year is a cycle, and a year is divided into five seasons by four seasons), while the growth cycle of chicks is short, and the longest one will not exceed one year, so the qi of heaven and earth is insufficient!
Second, old hens are mostly raised in rural areas and eat less feed (mainly for laying eggs instead of eating meat), while small hen farmers will feed a lot of feed to promote their growth in order to lay eggs as soon as possible, so people who buy hens to supplement their health generally buy old hens!
But the older the hen, the better, because people keep hens mainly for laying eggs. Hens are prone to get some diseases, such as ovarian cysts and uterine fibroids, because they have laid eggs for many years. The probability of illness is directly related to the feeding age. The longer the feeding time, the higher the laying rate and the higher the incidence of hens. Therefore, it is generally better to buy an old hen within six years (there is no such old hen now) for three years, because a healthy and nutritious hen for about three years is the best choice.