Why did my cockatiel stop singing and start screaming and biting?

Thanks for reaching out about Keke. It appears as if he might be hormonal, searching for a nesting site, becoming territorial. Monitor for appetite. If becomes lethargic or eating less, a veterinary visit is recommended. Good luck.

Thanks for reaching out about Rue Pippins. Pain could be a concern but also stress or fear. Something might have scared him and might take some time to recovery. Monitor appetite and water consumption and seek a veterinary visit if needed. Good luck.

Losing a mate or part of the flock can be traumatic. Try to gradually reacclimate him to you. Begin by simply sitting by his cage for ever increasing periods of time. Speak softly and move slowly around him. End each visit with a small treat. Once he is fine with that, place your hand in the cage for ever increasing periods of time. He may squawk and flap and move away at first. That's fine. Do not attempt to touch or pet him. Once he settles down, you can coax him closer to you using treats. It will take time and patience, but eventually you should be able to win him over and get him to per h on your finger.

Honestly, that's a strange response to a different tune, however it's possible there is something underlying going on at the same time and the signs you saw were a coincidence with the song. It may also be that something startled her, causing her to respond the way she did. If she is otherwise back to normal, i would keep an eye on her, however if the strange behavior happens again to the same stimulus, or she exhibits this behavior again on her own, scheduling a veterinary exam to look for any underlying health issues is best.

Thanks for reaching out about Ahmer. If she was a hand-fed baby, maybe she associates people with feeding, and is hungry, not completely weaned. Do you see her eating, are feces present? Does she quiet when someone enters the room? Birds are very social and often don't feel comfortable when left alone. She might just need time to adjust. Monitor appetite and water intake through fecal and urine production. Good luck.

Cockatiels are extremely vocal birds, so it may just be that Cici is excited and very "talkative". Giving him some fun things to do such as adding in an enriching toy that requires concentration to open or play with, playing soothing music, or even moving him to a quieter location free of other pets and people may help him to settle down some. If he is housed with another bird, there could be competition over perches, food and water dishes which is causing stress, so adding extra in and making sure there is enough room for both birds may help. If he does continue screaming, or seems ill or painful in addition, a vet visit is always a good idea to rule out any pain or underlying health issues.

I'm sorry to hear Baby got so startled! I would examine the wing he is chewing on/having trouble with to check for any injuries or wounds that may be obvious, and also limit his activity for a day to see if it helps with any minor injuries. If you suspect the wing is broken or there is a broken or torn blood feather, seeking veterinary care right away is best for treatment.