Few people keep five black chickens for several reasons. First of all, Wuhei chicken is a traditional local breed, with a relatively small number and limited supply in the market. Secondly, the growth cycle of Wuhei chicken is long, and it takes a long time to reach the standard weight of slaughter, which makes commercial breeders tend to choose high-yield chicken breeds with fast growth and good meat quality. In addition, the five black chickens have low egg production and are not suitable for large-scale egg laying. In addition, due to the high requirements on environment and feeding conditions, it is relatively difficult to breed five-black chicken, which requires professional breeding technology and experience. Finally, consumers' awareness of black-bone chicken is low, and few people understand its characteristics and nutritional value, resulting in less market demand. In short, the limited supply, long growth cycle, difficult breeding and small market demand are the main reasons why the five-black chicken is rarely raised.