What changes the health answer
Check whether the bird is truly eating or only cracking shells, shredding food, or sitting near the bowl. Then call an avian vet for guidance.
Look for other signs
Fluffed posture, quiet behavior, weight loss, fewer droppings, vomiting, breathing effort, weakness, or sitting low makes this more urgent.
Check access and change
New food, dirty bowls, spoiled food, bullying from another bird, cage changes, or a scary room can reduce eating.
Keep stress low
Keep the bird calm and prepare a carrier. Do not force food or water unless a vet tells you exactly what to do.
Urgent rule
Small birds and sick birds do not have much reserve. Appetite loss deserves fast action.