When humans are ill, it seems our nature to let others know. When our feathered friends get sick, their natural instinct is to hide the fact. Predators in the wild quickly pick up signs of weakness. Evidence of sickness is cautiously concealed until the bird is physically unable to do so. To you and me, an illness which has been festering for days, weeks, or even months seems to suddenly appear. Often, by this time, it is too late.
Responsible bird owners need to educate themselves on how to recognize signs of trouble. Most symptoms of illness which birds display can already be classified as acute (usually during the first few days of illness) or chronic (the bird has been sick for 5 days or more). Very early signs of illness in a bird are very subtle and difficult to detect.

If any of the following symptoms are noticed in your pet bird, it is time for a visit to a veterinarian with avian experience:

1.Squinting appearance to the eye instead of full eye ring
2. Constant shaking or vibrating as if shivering to the bone
3. Abnormal respiration or sounding likes breathing through a straw, or clicking
4. Tail bobbing as if having trouble breathing
5. Trouble perching
6. Reluctance to feed or change in feeding habits
7. Drinking more water than usual
8. Discharge from nostrils
9. Weight loss (know your bird’s normal weight)
10. Inactivity or no preening activity
11. Eyes closed most of the time or sleeping at unusual times
12. Unusual aggression or behavior changes (such as vocalization stops or
Unusual tameness in a usually aggressive bird)
13. Frequent sneezing
14. Color change of feet or beak
15. Unusual screaming or vocalization
16. Vent soiled or pasted with droppings
17. Bleeding anywhere
18. Visual protrusion from vent
19. Feathers lost in unusual amounts or lost and not replaced
20. Swelling anywhere on bird
21. Self mutilation of feathers or body
22. Regression to infantile behavior
23. Bird preferring to be on bottom of cage
24. Excessive or too long molt
25. Stress marks or dark barring on feathers or change in feather color
26. Unusual smell on bird
27. Frequent flicking of the head or head movements such as twitching
28. Running around in a circle with head to one side
29. Discolored or runny droppings - decrease or increase in number of droppings
30 any change on beak
31. Lameness
32 Bird stretched out supporting self-hanging on cage side
33. Debris in mouth
34. Sitting constantly fluffed (not to be confused with periodically fluffing out)

Remember that you are in the best position to recognize changes in your pet!