I would like to reiterate Stormcloud's warning about dogs stressing yourc B&G. She is a prey animal and they are predators.
My GW Jasper is in the middle of a major molt right now and there is down and feathers everywhere. As Macawnutz said, a macaw will have areas that are always look more lightly feathered or even bare. Jasper's bare areas are under her wings and on the insides of her legs.
As your bird is molting she will benefit from more VEGETABLE PROTEIN and vitamin A and fats. I provide these to Jasper with Tofu (uck), prozyme and extra red palm oil. Prozyme is a product that assists in the digestion of proteins. Red Palm oil should be a regular part of her diet and tofu is great for putting weight on a thin bird.
Lots of shower/bathes will encourage preening. If she is a single bird, your help in preening will be appreciated.
I think you are looking at a normal molt, but you can help her along with it.
yes I understand about the dogs.