Pastures (or backyards) full of rich grasses, ground covers, and cover crops are a wonderland for your flock, giving them plenty of opportunity for forage and exercise.
The darker the green the better, so I often fix them a feast of edible amaranth, kale, mustard greens, broccoli leaves, or whatever I happen to have growing in my garden.
They love to forage for dandelions, mallow, clover, oxalis, chickweed, purslane, and other plants that sometimes grow where they shouldn’t.
Not only will they take care of the pests on your spent plants, they’ll eat whatever’s left on the stems, including flowers and seeds.
The chickens will eat what they want, shred up your scraps for quicker composting, and keep themselves busy and entertained on days they can’t free-range.