Why Is My Pet Bird Losing Feathers?

Feather loss in pet birds can be alarming. Their vibrant plumage is part of what makes them so striking - and when feathers start falling out unexpectedly, it’s often a sign that something’s wrong. While some feather loss is completely normal, other cases may point to a health issue, environmental stress, or behavioral problem.
Here’s what you need to know about the most common causes.
Molting: Normal Feather Loss
The most common reason birds lose feathers is molting, which is a natural process where old or damaged feathers are replaced by new ones. Most pet birds molt once or twice a year, and it can last for several weeks.
During molting:
- You’ll see feathers at the bottom of the cage
- New “pin feathers” may poke through the skin
- Your bird may seem a bit less active but should still be eating and behaving normally
When to worry: If the feather loss seems uneven, happens outside of molting season, or is focused in certain areas, it could be a sign of something else.
Stress and Environmental Factors
Birds are highly sensitive to changes in their surroundings. Stress can lead to a behavioral issue called feather plucking, where the bird pulls out its own feathers.
Possible stressors include:
- Loud noises or sudden changes in routine
- Boredom or lack of enrichment
- A new pet or person in the household
- Inadequate lighting or poor cage placement
- Drafty rooms or fluctuating temperatures
Birds need a consistent day/night cycle, a quiet and safe environment, and regular mental stimulation to stay healthy - both physically and emotionally.
Poor Diet and Nutrient Deficiency
Feathers are made of keratin, a protein that relies on proper nutrition for healthy growth. Birds on seed-only diets are especially at risk for deficiencies in:
- Vitamin A
- Vitamin D
- Calcium
- Essential fatty acids
These deficiencies can lead to brittle feathers, delayed regrowth, and ongoing feather loss. To support feather health:
- Feed a balanced diet with high-quality pellets
- Offer a variety of fresh fruits and vegetables
- Add occasional protein sources like hard-boiled eggs
Always check with an avian vet before making major dietary changes.
Underlying Health Issues
Sometimes, feather loss is a symptom of a medical problem. These may include:
- Hormonal imbalances
- Liver or thyroid disorders
- Skin infections or parasite
- Tumors
- Psittacine Beak and Feather Disease (PBFD), a serious viral illness in parrots and related species
If the feather loss is sudden, excessive, or doesn’t appear linked to molting or stress, it’s important to see an avian veterinarian. Diagnostic tests like blood work or skin scrapings may be needed.
When to See a Vet
Contact a vet if you notice:
- Bald patches
- Broken or bloody feathers
- Self-inflicted feather damage
- Skin redness, scabs, or swelling
- Feather loss that doesn’t follow a normal molting pattern
Early diagnosis and treatment can make a big difference in your bird’s recovery and long-term well-being.
Supporting Feather Health at Home
To help your bird maintain a healthy coat of feathers:
- Provide a nutritious, varied diet
- Keep their habitat clean and well-lit
- Offer regular enrichment and attention
- House them in a low-stress, stable environment
Feather loss isn’t always cause for panic, but it is always worth paying attention to. With the right care and quick response when needed, your bird can stay healthy, happy, and beautifully feathered.

A proud mama to seven dogs and ten cats, Angela spends her days writing for her fellow pet parents and pampering her furballs, all of whom are rescues. When she's not gushing over her adorable cats or playing with her dogs, she can be found curled up with a good fantasy book.
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