I am now very confused. I read a good article (in Backyard Chickens) about bedding and ventilation. I have a small wooden coop at present with just two Buff Orpingtons . I bought the coop on-line, it was recommended for 3 - 4 chickens. There is no ventilation as such just the tiny seams from round how the coop is made. Does it need more ventilation? I notice there is some black along the top of the nest box which is caused by damp and will eventually cause a mould. Do I make some vent holes somewhere in there? I am frightened of causing drafts. Temperatures here where I live in the UK have not reached below freezing (yet). Any recommendations from you more experienced BYC keepers would be much appreciated.