Today we are going to start retro-fitting an existing shed on our property to be our new hen coop. The shed has no floor (just dirt) and my question is: must it have a floor? If not, how will I keep it clean? How can I sterilize dirt? Other than routinely cleaning out bedding (which I do on a regular basis) what else can I do to ensure it is a disease-free place to live? What type of beddings do you all use?