Parrots, canaries, and other companion birds have complex social, cognitive, and behavioral needs that are difficult to meet in typical household settings, leading to widespread behavioral problems.
Feather-plucking is a stereotypic behavior caused by boredom, frustration, and social deprivation — the parrot equivalent of self-harm. Screaming is a contact call that never receives an appropriate flock response. Psychological distress in highly cognitive birds causes suffering that is real and measurable even if it does not involve physical pain.