I have one like this.  She is a beautiful Eclectus parrot that has many of her feathers gone.  I gave her and her forever mate a home when they needed one.  Their former human couldn’t take care of them any longer.  Sadly, Cheech passed away (cancer).  It could not have happened at a worse time.  Beautiful was entering her teen years and had begun to lay eggs.  She became depressed after the loss and she lost much of her feathers.  She has some, but not many left.   Patience and lots of love have given her the courage to live without her mate.  I pray that she stays with me for a long time.  She still grieves as my Amazon does (his BFF Buddy passed).  Such incredible birds.