I agree with the others about a check up w/tests. Do you have even older photos of her that would demonstrate just how much color she's lost? One other question as it relates to a loss of pigmentation on new feather growth on one of my crimson bellies years ago. He had yellow and white feathers show up on new flight feathers ( the whole flight feather), orange and tinged orange feathers that should be red, a few yellow feathers on his back, and two or three tail feathers that came in orangey instead of deep blood red. I used to allow Rocket to fly into the kitchen to me when I would wash bird cups. He loved drinking from the faucet even if the water was fairly warm but not more than 107 degrees. I've filled my water cups for years from the kitchen sink but always with the cold water tap. The pipes under my house are copper. Letting him drink those few sips on a frequent basis was enough to cause his new feather growth to start changing. It was quite alarming. He has been banned from ever drinking from the faucet. It took a good year and maybe more for his feathers to molt and return to their true color and have been ever since. He was three years old then ...He's 11 years old now. None of the other three crimsons had the same thing happen, only Rocket had access to drink from the tap.
