Chickens shall be sheltered in a chicken coop that has a minimum square footage of six square feet and two square feet per chicken, whichever is greater in size. No chicken coop shall exceed the floor area size limitation for tool sheds in Section 26-23.9 (Residential Tool Shed). The chicken coop shall be fully enclosed. The chicken coop shall not be taller than six feet above the ground surface. Chicken coops shall comply with the accessory structure setbacks from the zoning district, but in no event shall the setback be less than 10 feet from any property line or habitable structure on the same lot or 30 feet from a habitable structure on an adjacent lot. Chicken coops shall be kept in good repair, have waterproof roofs and walls, be adequately lighted by natural or artificial means, and be ventilated.