However, modern cage chickens should do the opposite, reducing the feeding of vegetables to cage chickens. Among them, cage chickens have high requirements for feed and need a little concentrate, while cage chickens are poor in physique and have no resistance to germs in vegetables.

Free-range chickens can give them a lot of fresh vegetables to eat freely, but caged chickens can't. Because fresh vegetables need to be washed and chopped, it is inevitable that vegetable powder will be contaminated with germs or parasitic eggs in this process. However, caged chickens have little activity and single feed. If you feed them too much fresh vegetables, it will easily lead to diarrhea and even dysentery, so that the nutrients in the food will be excreted before being absorbed, which will lead to the weakness of the chicken's constitution and the decline of its disease resistance.