Milkwood permaculture offers an update on the Linda Woodrow chook dome with plans by Robert Freeman. They say it’s lighter and stronger.  Great for preparing beds for planting, with chickens doing all the work for you not only scratching up weeds but manuring as well.
https://www.milkwood.net/2009/07/27/how_to_build_a_geodesic_chook_dome/