Matty is a very pretty Macaw! Some Macaws beaks shed their outer layers more frequently than those of other Macaws. Certain birds even seem to be flaking continually. It's quite common. If you're in doubt in Matty's case, though, you should consider asking an avian vet about it.
Thank you for all the comments. She continues to stun me me her beauty.
She is a miligold. I have never been around a military, but have a B&G and I think she gets most of her traits from the military. She is also quite a bit smaller than B&Gs that I have known.