I have an 20 yr old Orange winged Parrot that I have had for more than a year. He has always these white downy feathers on his wings that I thought might be stress in his previous environment but he has adapted well to our household and he and I are best friends. I have also not clipped his wings in more than a year so I want to make sure this is not a sign of something serious to his health or due to a deficiency in his diet. Any input is greatly appreciated.