I'm considering buying a house built in the late 1970's with a large backyard cedar deck. Would it be harmful to my Blue Front dear Amazon parrot? Is there any coating or anything I should put on the wood? Thank you for your feedback!
Unless you are letting your BFA walk around on the deck railing /decking it should not be a problem. If your plan is allow your BFA outside, you should use a cage to provide protection and separation from the elements.
FYI: Depending on the condition of the cider, at most a clear oil stain, if that! Most cider applications do not require the addition of clear cider oil.