Some interesting health articles I saw on this website. It's geared toward Greys, but I think much of it could apply to parrots in general: http://www.africangreys.com/articles.htm#Contents
NEW! Avian First Aid
NEW! Avian Holistic Care
NEW! Biochemical Individuality and Nutrition
NEW! Nutritional and Herbal therapy
Refined Sugar: Is It In Your Bird's Diet?
Sound Nutrition: The Key To A Healthy Grey
Why Food Is Better Than Pellets
Skin and Feather Care for Greys
Peanuts, Are They Healthy for Your Grey?
Grapes, Should I Feed Them To My Grey?
Chemical Dyes and Our Birds? Health
The Importance of Calcium in Our Greys? Diets
Are Sunflower Seeds for the Birds?
Sprouted Seeds: The Living Treasures
Nutritional Psittacine Diet (The Mash Diet)
Grapefruit seed extract
Baby Feeding, Not an Easy Task
NEW! Avian First Aid
NEW! Avian Holistic Care
NEW! Biochemical Individuality and Nutrition
NEW! Nutritional and Herbal therapy
Refined Sugar: Is It In Your Bird's Diet?
Sound Nutrition: The Key To A Healthy Grey
Why Food Is Better Than Pellets
Skin and Feather Care for Greys
Grapefruit seed extract
Baby Feeding, Not an Easy Task