type of wood for the coop

[HR Patterson]

If you are planning on marketing your eggs or meat as "Organic" I would not recommend using pressure treated. A list of allowable building material from USDA to be certified as organic.
http://www.ams.usda.gov/AMSv1.0/getfile?dDocName=STELDEV3100278&acct=nopgeninfo

 

[Cetawin]

Cedar

Not good. Maybe for floor supports but that would about it...I would be worried using it otherwise.