I am new at raising chickens. I have 3- 6 month old hens. We have built a raised hen house with an attached chicken run that is 5x8. The hens have the rub of the yard twice a day to forage as well. We have very sandy soil here on the Central Coast of California and I have not added anything to the bottom of the run. It is very dry here and I have redirected the sprinklers away from the run. The soil is very sandy and dry but after reading other posts I am wondering if I need to put something down? The hens dig holes and refill them all day long, constantly burying their poop. It is rare to see any standing poop in the run. I have never wormed my chickens either. Am I doing this right or wrong? Thanks!