Feather Growth Supplements improve overall health and result in beautiful, lush plumage. Growing healthy feathers requires specific nutrients such as keratin, an insoluble protein made of amino acids. Calcium, zinc, selenium, manganese, and magnesium are often deficient in feather pluckers. Deficiencies may lead to brittle, frayed feathers and itchy skin, both of which can lead to feather plucking / bald spots. Use feather growth supplements for parrots today for healthy, vibrant plumage.