1. Psittacosis (Chlamydiosis): This is a bacterial infection that can affect both cockatoos and humans. Symptoms include respiratory problems, conjunctivitis, and diarrhea.
2. Aspergillosis: This is a fungal infection that can affect the respiratory system, liver, and other organs. Symptoms include respiratory problems, weight loss, and lethargy.
3. Polyomavirus: This is a viral infection that can cause a variety of symptoms, including feather loss, diarrhea, and respiratory problems.
4. Beak and Feather Disease: This is a viral infection that affects the feathers and beak. Symptoms include feather loss, beak deformities, and skin lesions.
5. Proventricular Dilatation Disease (PDD): This is a viral infection that affects the digestive system. Symptoms include weight loss, diarrhea, and vomiting.
6. Giardiasis: This is a parasitic infection that can cause diarrhea and weight loss.
7. Coccidiosis: This is a parasitic infection that can cause diarrhea and weight loss.
8. Trichomoniasis: This is a parasitic infection that can affect the digestive system and cause weight loss.
9. Mange: This is a skin condition that is caused by mites. Symptoms include itching, skin irritation, and hair loss.
10. Feather Picking: This is a behavioral disorder that can lead to feather loss and skin damage.