I suggest wood chips as the base for a deep litter system.
People who use sand successfully are generally in a dry climate where they can scoop poop from the run like cleaning a cat box. In a wet climate the poop melts into the sand and stays forever.
Deep litter is a form of cold composting that uses a mix of materials to digest both the poop and the materials -- turning them into odorless, useful compost which will, in due time, turn any soil into rich, black, fertile, absorbent but easy-draining soil.
People who use sand successfully are generally in a dry climate where they can scoop poop from the run like cleaning a cat box. In a wet climate the poop melts into the sand and stays forever.
Deep litter is a form of cold composting that uses a mix of materials to digest both the poop and the materials -- turning them into odorless, useful compost which will, in due time, turn any soil into rich, black, fertile, absorbent but easy-draining soil.