Sorry, everything I can think of has already been covered.I'm going to invite @NatJ to this conversation, she's very knowledgeable. Myself, not an expert, I would not introduce this hen to Brian just yet though.
That sounds like a good idea. If in doubt, maybe wait even longer. I don't know how long it takes for a chicken to show symptoms of what diseases.I told the person she might be sick so I’ll give her a week indoors of watching her and if she’s definitely healthy she will be good to go but if not she will have to stay longer.