My formula seems to change from time to time. When it got hot this summer, and the girls started having a hard time laying, i did some reading here on BYC and started free feeding an equal mix of scratch and flock raiser, with a small amount of calf manna mixed in. When i have it, i also add some BOSS with the calf manna. One feeder full lasts them about 3 days. And of course, they root through the compost and get whatever scraps i can give them and whatever they get while free ranging.
I've had really good results. I'm getting tons of eggs now, and my dual purpose meaties, who get the same formula because they range together, are nice and meaty and even a little fat.