"Decomposed chicken manure" refers to chicken droppings that have gone through a natural breakdown process, where bacteria and other microorganisms have broken down the organic matter, transforming it into a nutrient-rich, dark, crumbly substance that can be safely used as fertilizer in a garden, essentially meaning it is composted chicken manure that is no longer fresh and has lost most of its unpleasant odor; it is considered ready to be applied to plants