- Normal molting: loose feathers found in the cage, new pin feathers growing in, bird appears comfortable and is not actively pulling feathers.
- Feather plucking: bird is seen actively pulling, chewing, or damaging its own feathers; bare patches; damaged feather shafts; feathers that look broken or chewed rather than naturally shed.
The head and back of the neck cannot be reached by the bird's beak — bare patches there suggest mites or another bird interfering. Bare patches on the body, breast, and wings that the bird can reach suggest self-plucking.
Feather plucking that has been going on for an extended period can become a deeply ingrained habit that is very difficult to reverse. Early intervention gives the best outcome. An avian vet (not a general small animal vet) is strongly recommended — avian medicine is a specialty.
Possible Causes
Medical causes (always rule out first)
Feather plucking has a long list of potential medical causes that must be investigated before assuming it's a behavioral issue:
- Skin parasites: Mites and lice cause itching that makes birds scratch and damage feathers.
- Bacterial or fungal skin infections
- Psittacine Beak and Feather Disease (PBFD): A viral disease that causes feather abnormalities and eventual immunosuppression. Contagious and serious.
- Polyomavirus
- Internal conditions: Liver disease, kidney disease, reproductive issues, and other internal problems can cause feather abnormalities and plucking.
- Nutritional deficiencies: A diet that's primarily seed-based is often low in essential nutrients — including proteins, vitamins, and minerals — that are necessary for healthy feather production and maintenance.
- Allergies: Food or environmental allergies can cause skin irritation leading to feather plucking.
- Heavy metal toxicity: Lead and zinc poisoning can cause feather abnormalities.
Psychological and environmental causes
Once medical causes have been ruled out (or are being treated and plucking continues), psychological and environmental factors are considered:
- Boredom and under-stimulation: Parrots especially need significant mental stimulation and social interaction. Insufficient enrichment leads to self-destructive repetitive behaviors.
- Anxiety and stress: Changes in the environment, being separated from a bonded companion (human or bird), fear of a new pet or person, an overly stimulating or unpredictable environment.
- Sexual frustration: Hormonal birds that don't have an appropriate outlet for mating behaviors may self-harm.
- Habit: Feather plucking that began from a specific trigger can become a self-reinforcing habit that persists even after the original cause is resolved.
What to Check and Document
- Which feathers are being affected and which areas of the body are bare?
- Is the bird seen actively plucking, or are feathers just found in the cage?
- What is the bird's diet? Seed-only diets are nutritionally inadequate for most parrot species.
- What is the bird's daily routine — how much out-of-cage time, social interaction, mental stimulation?
- What changed before the plucking began?
- Are there other birds in the household?
Getting Help
- An avian vet will conduct a full examination including bloodwork, skin scraping for parasites, and possibly testing for PBFD and other diseases
- Bring documentation: photos/video of the behavior, diet history, and any timeline of when it started
- Be prepared for a staged investigation — finding the cause may take more than one visit
- Early intervention significantly improves outcomes