Hi Dan1227,
We have three large birds in our home, one is a Double Yellow Head Amazon. At your age I commend you for being so involved with your birds behavior and paying attention! Cudos! Avian Vet. is your best bet for a healthy parrot and always a good idea when a new Flock member arrives in your home. I am understanding this is your first med-Large Parrot? While you are at your appointment bring a prepared list of Q & A with you, ask about a balanced diet to gain a better understanding of your birds nutritional needs. Also talk to them about required sleep routines, bathing, toys, and social interaction. Avian Vets are especially helpful and great resources to gain knowledge on your birds care. They will also be your best resource for your feather attention concern, hands on- is the best!
My Favorite all around parrot food book is written by: Robin Deutsch, The Healthy Bird Cookbook: A Lifesaving Nutritional Guide and Recipe Collection- It is more than a cookbook, It offers a breakdown about certain foods and poisons to avoid. Your Amazon will be with you your entire life, our Amazon Fido, owns our Daughter- they are the same age and have at least another 40 years to go or more.
I'm sure I got carried away with info. Would love to hear how your apt. goes.
Cheers