I thought I would put together a list of symptoms to look out for, Cockatiels in the wild that are ill are sure to be prey so they are very good at hiding there illnesses, I always say you should go with your first instinct if you suspect something isn't quite right it usually is and you should seek out an avian vet for help.
1. Inactivity or loss of interest, any change in normal activity
2. Loss of appetite
3. Change in colour or consistency of droppings not associated with
foods you have added to there diet for example fruits and
vegetable can make the droppings watery
4. Feathers fluffed up for most of the day
5. Sitting in the corner or on the bottom of the cage with eyes closed
6. Constant shivering or labored breathing
7. Discharge from the nose or eyes
8. Sudden lose of feathers not associated with normal molting
9. Weight loss
10. Vomiting
11. Feather plucking
12. Lumps or any swelling on the body
13. Disorientation or falling of perch
These are just some of the things to look out for, this is just a basic guide anything that seems abnormal should be looked into.
1. Inactivity or loss of interest, any change in normal activity
2. Loss of appetite
3. Change in colour or consistency of droppings not associated with
foods you have added to there diet for example fruits and
vegetable can make the droppings watery
4. Feathers fluffed up for most of the day
5. Sitting in the corner or on the bottom of the cage with eyes closed
6. Constant shivering or labored breathing
7. Discharge from the nose or eyes
8. Sudden lose of feathers not associated with normal molting
9. Weight loss
10. Vomiting
11. Feather plucking
12. Lumps or any swelling on the body
13. Disorientation or falling of perch
These are just some of the things to look out for, this is just a basic guide anything that seems abnormal should be looked into.