I am trying to build my coop as cheap as possible. In doing so I have asked all friends, family, and acquaintances for their scrap wood. Doing this I have gotten a mixture of treated and non treated wood. I have been careful to use the non treated lumber in places that will not be as exposed to the elements (i.e. floor joist). I am using treated for any wood that I have to buy. My question is what to do about finishing the non treated wood.... if anything. If I have to prime and paint, I would be looking for a nontoxic solution of course. Depending on what other wood I get I may paint the whole coop and run or leave it natural. Suggestions????