Why is my cockatiel lethargic, puffed up, sleeping, and aggressive?
Updated On September 23rd, 2025
Pet's info: Bird | Unknown - Bird | Male | unneutered | 1 year and 1 month old
My cockatiel is untamed and around 1 years old and is sitting in the bottom right corner of his cage with his head on his back and is feathers puffed up and also constantly sleeping. He is normally a very scared bird but today he is more aggressive and lunged to bite me and he has never done that before. Please help!
3 Answers
Most Helpful Answer
Published on July 19th, 2018
Behavioral changes and sitting fluffed up/lethargic on the bottom of the cage can both indicate there is something going on that is making George feel unwell. As these are very vague signs of illness, it would be best to try and bring him to a vet ASAP for care. Illness, injury, disease, parasites, malnutrition, etc can all cause these symptoms, so having an exam to rule out more serious problems and get George started on treatment is best. If he is untame/wild and can't be handled, you can try tossing a towel or bird net over him gently to be able to catch him and place him in a travel carrier to get to the vet. Keeping the carrier covered with a towel or sheet can also help reduce stress and keep him calm on the journey.
2Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on December 23rd, 2017
Cute bird! If he's otherwise acting normal, it's possible his cage could be in a drafty area (even if it's kept warm), or he may be a bit stressed out, especially if you just recently got him. Making sure he isn't being bothered by other pets or people, and he has places to sit and relaxed without being bothered may help. If he's plucking out his feathers, this can also be a sign of stress or boredom. If the puffing up continues, or you see any other issues such as changes in behavior, loss of interest in eating or drinking, redness or itching of the skin (especially if he has some feather loss), etc, having him checked by a vet is always best.
1Pet Parents found this answer helpful
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Published on April 30th, 2019
While it can take some time for birds to settle in, they should not be losing lots of feathers, acting lethargic, or have stool or other materials stuck to their vents. This is more likely an indication of an issue such as too many treats/snacks, underlying illness such as parasites, poor nutrition, infection, etc. If both birds are affected, having them treated for parasite and examined by your vet is a good idea. Making sure their environment is clean, warm and draft free, away from any stressors, and they have access to fresh food (removing any snacks or treats that could cause diarrhea) and water may help, however if their symptoms continue, vet care is best.
1Pet Parents found this answer helpful
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