So, here's the backstory. When I first got chickens, we would let them free-range in our yard. They clearly loved it, but they were just SO messy. Poop everywhere and I couldn't keep them out of my vegetable beds. They were just murder on all the plants, and they would kick the dirt down off our hillside. So, once we remodeled and redid the backyard landscaping, I decided to just keep them penned. They have a goodly amount of space, a 4x5 henhouse and a 3 x 8 run for 3 chickens. I am planning to build them a new run which will be about 4 x 10 or 12. My question though is, how much supplementing of their diet will I need to do and will I need to put a sand box or dirt box in their run so they can dirt bathe? I think they really miss doing that and I don't want them to have trouble with mites. I do give them fistfuls of grass and weeds to eat and they also get our table scraps (when we have them!) but not every day. Also, do you put anything in their run for flooring? I've been using bark chips but if there is a better solution I'd love to hear it.