I am working on building a night enclosure for my pheasants. I've run out of room in my barn so this enclosure has to be completely outdoors. The plans I have seem well ventilated but I'm unsure of the dangers of pressure treated wood. Will the chemicals be dangerous to my birds? What's the risk? I want to start working soon so please help!! I live in a really wet area so I don't know how the enclosure will hold up without pressure treated or stained wood.