I apologize that no one has responded to your question sooner. Different experts come online at various times. I just came online and saw your question. My name is ***** ***** I’m a biologist with a special interest in birds. I'm sorry to hear of your macaw's past.
You have undertaken a difficult project, and it will take a lot of time and patience. She is very stressed right now. She's been moved, and is in a strange place with people she doesn't know. She'll need some time to acclimate to her surroundings. For the first week, it would be a good idea to keep her cage partially covered to make her feel more secure. Put the cage in a room where you spend a lot of time. That will help her get used to your presence and to help her realize that when you move about, she's not in danger. Talk softly to her from outside the cage, but don't try to put your hand in until she feels comfortable in your home. For many birds, that will be after about two weeks of becoming accustomed to family activities and listening to you talk from outside the cage. At that point, you can offer her a treat, or just let your hand rest quietly in the cage. when she's at ease with that, gently rub your finger on her breast, just above the legs. That may encourage her to get on your finger. There are no shortcuts to taming - you'll need patience and will simply have to spend time at each stage before moving on. If you move on to a next step and she seems scared, you'll need to back up to the previous stage. There simply is no substitute for patience and time.
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