Andy and Carol Kmetz of Sapulpa, Ok are avid gardeners that have developed a unique way to use their chickens to improve their garden and their gardening experience. Andy grows vegetables and berries in a 60’X40’ garden that is enclosed by two fences.
While researching underground coops I ran across the article at Masters of Horticulture
Such a great idea to give more room to roam for chicken confined to a coop and run. This allows extra area for foraging around your garden while keeping them protected at the same time.