I have 4 pekins and they are about 8 weeks old, once we moved them outside into their run, they learned to go into their house at night after we placed them in it at night time for a couple of days. Our run is cement but I have rubber horse stall mats covering most of the cement, we hose it down sometimes twice a day. They forage around my yard for a couple hours each day and they have a pool that we fill daily, I have pine wood shavingis in their house and clean is as needed. I noticed that my ducks were not putting themselves to bed for the past few nights and realized that there are hundreds of bugs all over their house inside and out, so I cleaned out all the shavings and I'm letting it air dry, what can I do to prevent that. The bugs are about the size of a gnat and we live in Massachusetts, not sure if that info helps.