Hello all in the past 1-2 months my Severe Macaws feathers on his back and chest have started to change from their normal colors to a rusty/maroon color and seem to be thinning somewhat. He is approximately 14 years old his diet consist of Hartz macaw feed, fruit, and some vegetables. Until about 2 years ago I was able to get him yearly check ups, but the local avian vet passed away and the nearest one is 2 hours away so check ups are quite difficult now. Has anyone ever seen or heard of this before?