About three months ago my husband built my girls a new coop. It is well built with sealed everything and a metal roof. The problem I am having it there is mold growing on the sides and top of the coop. There is not power out to the coop and it is not insulated. I live in Oregon which is wet but not cold enough to heat or insulate. My question: is there anything I can do to stop the growth of the mold without harming my girls? I was wondering if there is a paint or something that could be put on the wood. If there isn't is it safe to spray bleach water onto the mold to kill it? Thanks for your input!