Feather-destructive behaviour (FDB) in parrots - plucking, chewing or overpreening feathers - is a complex welfare problem with medical, nutritional and psychological causes requiring systematic investigation.
FDB represents a welfare emergency because it indicates significant distress (whether medical or psychological) and causes progressive physical harm. A parrot that removes its own feathers is in sufficient distress to override powerful grooming instincts and engage in self-damaging behaviour. The welfare challenge is that FDB is a symptom, not a diagnosis - multiple potential causes must be systematically investigated and addressed. Single-cause treatments (antibiotics alone, antidepressants alone) typically fail. The comprehensive welfare approach combines thorough medical investigation, nutritional assessment, environmental enrichment, social management and, if required, pharmaceutical support.