This is a good topic. I'm sure many have different opinions. For me chicks always have food 24/7. After all birds are on yard feed I give about 6-7 ounces of feed per day per bird. I use half pint feed cups. A little less for adult birds. I feed twice a day in cold winter months, with added whole corn with the second feeding before bed. Depending on breed layers can and will eat a lot more than gamefowl. Layers have full feeders in their coops 24/7 also. Some birds are totally different though. I have some that will eat as much as you give em, and some that barely eat it all. If I see they aren't eating all of it I'll cut that pen back some. I do things different than some guys though. I hate filling feeders and waterers and switch to cups as soon as I can. I give fresh water twice a day in summer. Once at night and then when I get home from work in the early afternoon. Winter it varies how cold, I break ice often. None of my birds are overweight so you can tell by feeling down between their legs if there's any extra fat on em.