We raised our coop so the hens would always have underneath for shade/shelter, etc. When they aren't free ranging they love hanging out underneath it even on beautiful days, however we are in our spring tornado/thunderstorm season and have had a few days straight of rain and it's a sopping muddy mess in the entire pen/run. It's because the coop is built somewhat downhill which was unavoidable as our large acreage is almost all hilly except way far from the house, and we didn't want chickens that far away.
We had placed a few bags of sand down, esp. under their nipple waterer, but it hasn't done any good. We throw weeds/grass in there when we have it. They have a tire in there filled with sand/ash (and lots of chicken poop now) that also got wet in the storms.
Any suggestions on how to give them a better place to lay/dustbathe, etc? I had posted before about sand getting blown away (it's also super windy where we live almost daily), and now I'm afraid it's just getting washed away.