She'll settle in - it sounds like she is starting to already. I would keep an eye on her just to be safe and respond to any changes that could indicate something more serious.
Being a bit older it is likely a reaction to the change of setting and separation from the birds she had with her at the previous location. As a social animal, she has bonded to the birds she was kept with and associates them as her flock - being removed from them and put in a new setting...