Not sure how much to feed our girls, I looked it up. The UCDavis site (http://animalscience.ucdavis.edu/avian/feedingchickens.pdf) says 1.8 - 2.4 lbs/week for layers, which comes to about 1/4 - 3/8 lb./day. Two of those pink cupfuls, well rounded, would come to 1 1/2 lbs, or the minimum for 6 girls for a day. Make it 3 not-soo-full cups and it would be about the maximum. Better check my math - I make mistakes more often than not.
That's just the formal feed, not the green treats or bugs. Not sure how that would impact the feed, but I did read that popcorn (Orion's favorite treat) is just that: a treat, like dessert, not intended to replace "real" food.
In addition to noodles, rice, leftover cooked cereal, and of course greens (give 'em some of that vetch growing between the peaches!) they LOVE dairy, which is apparently OK for them: yogurt, cheese, milk. Soak dry stuff like bread in milk to make it even better and better for their digestion, I hear.
Other research results or informal discoveries of what they like?