Must the selection of broiler cages be closed

Does the choice of broiler cages have to be closed? When we choose broiler cages, we have to choose closed ones. How do we choose them? Let me explain to you that the choice of broiler cages must be closed.

After each batch of broiler chickens are released from the cages, the cages should be thoroughly cleaned, and the manure and grass mats should be cleaned out, and the ground surface soil should be replaced. The utensils in the shed should first be disinfected by spraying with 3% to 5% lysul solution, and the grassy hills and roads where chickens have been raised should also be sprayed with a layer of cooked lime on the ground and then sprayed and disinfected.

No-pollution of grassy hills and grasslands, nomadic breeding, each batch is best to use a new cage. The caged broiler chicken cage must be a fully enclosed chicken house without a window. The exhaust air is used to exhaust the air from the house, and fresh air enters the house through the air inlet. The hen house uses artificial light instead of natural light.