1. Poor nutrition – seed only diets, seed-reliant diets
2. Toxic fumes – Teflon, cigarettes
3. Conditions from dirty cages, water, old food
4. Vitamin deficiency – Vitamin A, Calcium, Phosphorus and D3
5. Dehydration – have multiple drinking cups
6. Flying loose – can get hurt
7. Other family or neighbor pets – cats, dogs
8. Toxins – toys, food, plants, chemicals, fumes
9. Stress
10. Contact with infected birds or animals
