Why is the chicken farm closed and refused to visit?

A modern chicken farm must be closed. Specifically, no one is allowed to enter the henhouse except the feeding management personnel. Some people think the chicken coop is dirty and smelly, so what's the harm if others (especially leaders) come to see it? In fact, the purpose of closed feeding is firstly to prevent the spread of infectious diseases, and secondly to reduce the influence of stress on chicken growth.

The occurrence and spread of an infectious disease need three factors: susceptible animals, transmission routes and sources of infection. There are a large number of susceptible animals in chicken farms objectively, and the source and route of infection should be strictly controlled. It is difficult for outsiders to judge whether they carry pathogenic microorganisms. Some pathogenic microorganisms (such as Mycobacterium tuberculosis) can spread through the air, so even though tourists have no direct contact with chickens, they may still spread. Some pathogenic microorganisms (such as mold) have strong resistance to the external environment. Once introduced into chicken coops, they can survive for a long time, and when conditions are suitable, they will spread in large quantities and cause harm.

Secondly, animals gradually adapt to the environment in the process of growth and form some life rules and conditioned reflex, such as diet and breeders. Any change will stimulate them to produce stress reaction more or less and affect their production performance. Therefore, reducing or even eliminating foreign workers can avoid these stress reactions.

For the visit that is hard to refuse, it is recommended to watch the video, which not only satisfies the visit, but also protects the chicken.