What feed can be given to caged chickens to improve meat quality?

The meat quality of caged chickens is inferior to that of free-range chickens, so their commercial grade is low. Poultry experts have proposed a feed formula for caged chickens: 70 to 85% commercial chicken compound feed, 10 to 20% forage feed, and 5 to 10% leaf mold from the surface layer of garden or orchard soil. Feeding caged chickens this feed makes their meat texture and taste the same as free-range chickens, and the eggs they lay have bright yellow or orange-yellow yolks and thick egg white; the chickens' digestive function and disease resistance are significantly improved, and feeding costs drop noticeably.