I had been keeping my 5 young Khakis in a plastic dog house each night and hosing it off each morning. Now I have finished constructing their new pen and also a larger wooden duck house. I used the roof from a wooden playset and covered the back with wood & wire mesh, the front with a door and wire mesh. The bottom is open to the ground. What should I put on the ground in their house? Should I just leave it bare dirt & hose the poops into it each morning? If I put in straw or mulch, how often will I have to change it and add new stuff? Should I lay some washable type of mat in there that I could pull out & hose off daily? Also, once they start laying will they lay in that house? Should I add a nest box in there for them to share or will they just use a handy corner? My favorite chicken coop has a dirt floor that I cover with mulch or straw. The poop just breaks down & disappears in there, I only have to rake it out once a month. I'm hoping to have a similarly low-maintenence duck house. Thank you for your imput!