i have raised a few flocks so far in my life and the one thing i have noticed about feeding your chickens is they are kinda like goats and will eat more different kinds of things than you think. my chickens eat lettuce, weeds, grass, tomatoes cucumbers, raddishes, apples and all sorts of veggies. heck one time my baby gave them chicken nuggets and they ate that like it was a treat. i let my ladies forage around the backyard for several hours a day, picking at all the weeds and grass and bugs. this new flock is only 5 weeks old but have been going out in the yard for 3 or 4 weeks now. i bought a 50lb sack of chick starter for13 hens and they have full time access to it all day and i think i have went through maybe 25 lbs or so of it, and part of that is because i changed their food when they pooped in it. i love my ladies but when it comes to food...their dumb...they eat whatever and they lay eggs just as good as a chicken on a monitered diet. the only thing i make sure i give them is oyster shells when their around 14 -18 weeks. i say let them eat it if they want to eat it...saves me from buying so much feed. do you think that generations ago they have scientifically made feed for chickens....nope they ate whatever thay could find...dont have to be so precise unless maybe this is a bussines for you...