Don't let her fool you. She is an expert.I'm no expert, not by a long shot! Even if confined to pen and run, cutting back a little and only feeding once a day should be fine. Especially then..they get very little exercise in a coop and run situation, so they don't need a ton of food to keep a good body condition. You'll have to experiment with it and see how they do when you cut back...on body condition, not on signs of appetite. If you go by how hungry they act you'll be tube feeding them continuously just to fill their gullets.
Take them down to half a bucket and see how long it takes for them to eat it. They should have enough for one good meal and a snack later on...if not, take it a little lower until they do. Give them some good deep litter in the coop and run to give them something to do while they are in jail and they will adjust to the lower activity/lower feed levels.
Now that my flock are not finding bugs out on forage, I'm increasing their daily allotment up to 2 1/2 c. of feed per day from 1 1/2 c. and will monitor it from there. Will be adding some BOSS this weekend for some fats and fiber in the FF.