I know that this is probably a dumb question but how do you clean the dirt in a quarantine pen? I have a 8' x8' pen that I used as a quarantine pen for my chickens that I want to turn into part of a larger flight for my golden pheasants and possibly some quail. My only issue with this is the fact that this was a place for birds that had at one time bad diarrhea. After deworming and good food the diarrhea cleared right up. I think that it was possibly stress from relocating them. The person I got them from took decent care of them and they were good weight and ate like cows but, when I asked when the last time they were dewormed I got the answer "Your supost to worm them?" They were in there for over three months until I was sure they were fine to let loose in with my others. Now I need the pen space but I want to make sure anything in the dirt will not effect my pheasants and quail. What if anything can I put on the ground to make sure this area is safe? Do I need to truck in dirt and lay a deep cover over the ground? Any help will be greatly appreciated.