Why Is My Bird Pulling Out Its Feathers?

Feather-destructive behavior (FDB) is one of the most complex conditions in avian medicine, with causes ranging from bacterial skin infections and internal parasites to chronic boredom and anxiety. A thorough veterinary workup is essential before any treatment protocol is started.

## What Is Feather-Destructive Behavior?

FDB describes any behavior where a bird damages its own feathers — from over-preening to active plucking and chewing. It is most common in African Grey parrots, cockatoos, and Amazon parrots.

## Medical Causes

Bacterial or Fungal Skin Infection
Folliculitis (infection of the feather follicles) causes itching and discomfort, triggering self-directed preening that escalates to plucking.

Internal Parasites
Giardia infection is strongly associated with feather plucking in cockatiels, causing intense skin irritation.

Nutritional Deficiency (Vitamin A, Calcium)
Deficiencies alter feather and skin quality, causing abnormal sensation. A seed-only diet is a primary risk factor.

Hormonal Imbalance
Chronic egg laying, reproductive disease, and hormonal dysregulation can drive feather-destructive behavior.

## Psychological and Environmental Causes

Boredom and Under-Stimulation
Parrots are highly intelligent animals requiring significant cognitive engagement. Insufficient enrichment is a leading cause of psychogenic FDB.

Separation Anxiety
Parrots bonded to a single owner may pluck when left alone. This is a welfare concern requiring behavioral intervention.

Cage Placement and Stress
Placement near windows with predator views, high-traffic areas, or near other animals can cause chronic stress sufficient to trigger FDB.

## What a Vet Will Do: Diagnostic Workup

A comprehensive workup includes: skin and feather cytology, full blood panel, fecal examination (including Giardia PCR), and assessment of diet and environment.