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First, introduce blindly. Only the price of the chicks is neglected and the quality of the chicks is neglected, or simply seeking for fashion. Without considering the natural conditions in the area and their own feeding conditions, blind pursuit of new varieties and varieties. Some feed chickens and layer chickens together, co-produce different batches of chickens, and even purchase chicks from infected areas, which makes feeding and management difficult, and provides conditions for cross-infection of pathogens and induced metabolic diseases. Second, premature production. Eggs are artificially elicited until they reach the age of opening. As the chicken body is not yet fully mature, it is easy to form premature aging, resulting in a slow rise in egg production rate, a short duration in the peak period, and some even without the peak period of egg production. Third, add material overwork. The feed powder contains many nutrients such as amino acids, multi-dimensional elements and trace elements, while the chicken has the habit of eating large grain feeds. If the added material is overworked, the chicken eats large amounts of large-grain feed, resulting in imbalance of the intake of nutrients. Affects chicken growth and production. Fourth, sudden refueling. When the feed needs to be changed due to factors such as the chicken's growth stage, market price, etc., the sudden replacement of the feed can easily cause the chicken's stress response and sometimes even cause death. Fifth, long-term medication. Due to the lack of necessary pharmacological knowledge, the use of drugs for a long period of time in the treatment or prevention of chicken diseases not only exacerbates the damage of the drugs to chicken kidneys, but also makes the bacteria resistant to drugs and brings difficulties to the prevention and control of diseases. Six, blindly medication. When the flock was onset, some chicken farmers and chicken farms did not use blinded drugs for diagnosis. Because medicine is not symptomatic, it not only delays the illness but also causes waste, which increases the cost of raising chickens. Seven, sick health polyculture. When there are individual chickens in the flock, they only pay attention to treatment, neglect isolation and prevention, and still feed the diseased chickens and healthy chickens together, which breeds conditions for disease transmission and prevalence. 8. Disregard disinfection. Individual chicken farmers and chicken farms can not correctly understand the importance of disinfection, only one-sided pursuit of lowering the cost of feeding, ignoring the disinfection work, leaving the hidden danger of disease outbreaks. Nine, ignore the elimination. Excessively value the survival rate, and we must not eliminate weak chickens and disabled chickens in reserve chickens; on the other hand, we neglect to eliminate old and low-producing layer chickens, and the ratio of input to output does not have overall consideration to affect the overall economic benefits. . X. Abuse of additives. This phenomenon is common among chicken farmers. Additives are considered as panacea, and abuse of additives not only increases the cost of feeding, but also destroys the balance between the nutrients in the feed, resulting in metabolic disorders of the chicken, and sometimes Cause serious economic losses. (714100 Huaxian Animal Husbandry and Veterinary Station of Shaanxi Province Lei Xiaoying)