sounds great. And the stuff the chickens don't eat may attract in insects that they do eat, so that's a win too. I've found areas let go are good for a few years, but can quickly start turning into a too dense area which reduces the diversity. A few shrubs and trees are great cover though, and...
if you grow a diverse assortment of local native plants, your chickens will be able to forage for more nutrients, over a longer period of the year, and with little to no input from you once it's established, than with any other arrangement. You will just need to keep the plant thugs that would...