My Lovebird has a bubble on the end of his toe where the toe meets the nail. It is flesh colored and he is in pain. He use to sleep in his coconut but now he sleeps on the bottom of his cage under his papers. He loves it there but never sleeped there before. His appetite is normal. He favors the foot when he walks and when I touched it he sqeaked. 
keep us updated, hoping for the best of luck for both of you.
