I wanted to reach out here to see if there's a vitamin deficiency associated with thinning feathers. My panama amazon has thinning around his legs and breast bone area. He's not plucking. It's uniform thinning. He's not the best eater in the world, even though he's served a plethora of fresh fruit and veggies daily. He usually heads for the banana and select seeds, which is why I'm leaning towards a deficiency. Would love to hear from you all as to what you think it could be from. TY!