I have a backyard coop with a run. The run is partially covered. In the summer in Florida it floods and parts of it are not draining. In previous years I've added sand, but the flooding washes the sand out and I'm back where I started. If it's wet it stinks and attracts flies. I'm curious what might work. I have read about deep litter, but there seems to be a lot of different options and most seem based on the bedding staying dry. I was thinking of putting gravel down and trying a deep litter on top of pine shavings and straw? But I'm looking for the advice of anyone who has a litter that works in a run that gets flooded in the rain.