Another reason to raise free range chickens...on the pane of glass below where most of the roosts are in my hen house where they safely spend each night, there is a bone dry accumulation of chicken poop a few inches thick. I've begun breaking off small chunks to place atop the soil of potted plants to act as a slow release fertilizer, and will next soak big chunks in 5 gallon buckets of water to become liquid fertilizer for hungry plants in the ground and various container gardens. Waste not want not