Cockatiel Eye Infection: Causes, Symptoms, and Treatments


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Cockatiels are animated, affectionate pet birds that have captivated owners for decades with their bold colors, quirky head crests, and ability to “talk”. However, their eyes are delicate and prone to various bacterial, viral, fungal and parasitic infections if not cared for properly. Understanding what puts cockatiels at risk and the available treatment options allows bird guardians to safeguard their vision and quality of life.

Anatomy and Function of Cockatiel Eyes

To appreciate how eye infections develop, it helps to understand basic avian eye anatomy and function:


Key structures include:

  • Conjunctiva – thin, transparent tissue lining the inner eyelid and front of eye
  • Cornea – clear, protective outer layer covering iris and pupil
  • Iris – colored part regulating light
  • Lens – focuses images on retina
  • Retina – processes and transmits visual signals to brain via optic nerve
  • Lacrimal gland – produces tears


Special adaptations give birds excellent vision:

  • Large eyes positioned on the sides of their heads give wide fields of view.
  • Unique tubular eye shape with larger lenses enables strong focusing.
  • A highly vascularized retina packed with photoreceptors allows sharp images.
  • Ability to see a wider color spectrum detects ultraviolet light.
  • Eyes more resistant to uv radiation than human eyes.


Good vision serves essential survival purposes:

  • Identifying food sources
  • Locating nesting sites
  • Spotting predators
  • Choosing mates
  • Bonding with flock mates
  • Enriching quality of life in captivity

Unfortunately, their complex eyes are very vulnerable to infection.

Common Causes of Infection

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Many factors can trigger a cockatiel eye infection:


Bacterial conjunctivitis is arguably the most prevalent eye infection in pet birds. Causative agents include:

  • Staphylococcus – opportunistic bacteria living on body surfaces
  • Streptococcus – common respiratory bacteria
  • Chlamydophila psittaci – causes psittacosis/parrot fever
  • Mycoplasma gallisepticum – associated with chronic respiratory disease

Bacteria gain entry through eye injuries or contaminated dust, food/water, cages, toys etc. New birds can introduce pathogens.


Fungal eye infections often stem from spores in the environment:

  • Aspergillosis – typically originates in rotting plant matter or moist organic debris
  • Candidiasis – yeast normally present on skin and in digestive tract

Inhaled spores can infect eyes, especially in birds with weakened immune systems due to stress, poor nutrition, or existing illness.


Viral eye diseases pose high risk as viruses mutate readily to bypass immune defenses. Common examples include:

  • Polyomavirus – very contagious, causes severe symptoms
  • Psittacine Beak and Feather Disease Virus – attacks immune system
  • Proventricular Dilatation Disease – eventually fatal digestive tract infection
  • Pacheco’s Disease Virus – often asymptomatic initially

Close contact spreads viruses rapidly between birds. Survival time on surfaces also enables transmission through food, toys, cages etc.

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Microscopic parasitic organisms can infest eyes in several ways:

  • Knemidocoptic mites – burrow into skin around eyes causing crusty lesions
  • Toxoplasma gondii – single-celled protozoan parasite carried by cat feces
  • Cryptosporidium – ingesting fecal-contaminated food/water spreads this gastrointestinal parasite

For many parasites, cockatiels serve as “dead-end hosts” meaning while illness results, the parasite life cycle ends with them.

Nutritional Causes

Deficiencies in key dietary nutrients undermine immune defenses and eye surface integrity:

  • Vitamin A – supports mucus membrane health
  • Vitamin E – protects delicate eye tissues
  • Vitamin C – stimulates immune response
  • Beta-carotene and lutein – antioxidants protecting against free radicals
  • Zinc and selenium – help utilize protective vitamins

Common deficiencies arise when diets lack sufficient fruits, vegetables, whole grains and quality protein or rely too heavily on seeds.

Injuries and Irritants

Other eye infection triggers include:

  • Scratches/injuries from toys, nails, other birds
  • Dust, cigarette smoke, airborne chemicals
  • Dirty bowls/cages supporting bacterial growth
  • Stress weakening immunity
  • Medications with drying side effects
  • Dehydration

Now that we have covered potential causes, recognizing key signs of infection is critical for prompt treatment.

Symptoms of Cockatiel Eye Infections

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Unfortunately cockatiels frequently mask symptoms until an infection becomes severe, a protective adaptation in the wild to avoid appearing weak. Know what subtle signs indicate trouble:


The most common visible symptom, discharge may appear:

  • Clear
  • Yellow
  • Green
  • Bloody
  • Gritty with pus


Fluid buildup causes puffy, swollen tissue around the eyes. Vision can become obstructed before other symptoms manifest.


Constricted pupils, partially closed eyes, and eyes pinched shut in bright light signal discomfort.


Inflamed, bloodshot eyes accompany many infections. Blue tinting, uncommon but serious, happens with certain bacteria.

Feather Damage

Scratching at irritated eyes ruffles and breaks surrounding feathers.

Appetite Changes

Illness often suppresses appetite leading to weight loss long term.

Behavior Shifts

Infected birds tend to be lethargic and antisocial. They may excessively preen eye regions.

While any symptoms warrant veterinary examination, those advancing rapidly need emergency intervention.

Now let’s explore conventional and holistic treatment options.

Conventional Medical Treatments

Avian veterinarians have an array of medications to combat eye infections:

Antibacterial Medication

For bacterial infections, antibiotic eyedrops or ointments are standard treatment. Common examples:

  • Gentamicin – broad spectrum antibiotic for gram negative bacteria
  • Ciprofloxacin – potent fluoroquinolone antibiotic
  • Polymyxin – fights Pseudomonas aeruginosa
  • Tetracycline/Doxycycline Systemic antibiotics fighting Mycoplasma bacteria

Two or more antibiotic types may be combined. Treatment duration ranges from several days to a few weeks depending on the drug, severity etc.

Antifungal Medication

Fungal infections require different drug agents, usually given systemically as well as in topical eye preparations:

  • Ketoconazole – blocks fungal growth by inhibiting enzymes
  • Itraconazole – broad spectrum triazole antifungal medication
  • Fluconazole – especially effective against difficult Candida eye infections
  • Amphotericin B – controls Aspergillus eye infections
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Treatment lasts about 2-6 weeks depending on the particular fungal species involved and overall case severity.

Antiviral Medications

Drug options for viral eye infections are somewhat limited but include:

  • Interferons – proteins inhibiting viral reproduction
  • Ribavirin -synthetic nucleoside fighting DNA/RNA viruses
  • Herbal extracts – garlic, ginseng, licorice root (see holistic treatments)

Anti-Inflammatory Eye Drops

Steroid eye drops reduce swelling and ease irritation/discomfort:

  • Dexamethasone – fast acting and potent
  • Prednisolone – slower onset but longer duration

Use requires caution due to increased infection risk with repeated application.

Eye Flushes

Sterile saline solution may be used to physically flush irritants and discharge from eyes.

In severe corneal ulcer cases, surgery is sometimes required to save vision. Hospitalization in an incubator ensures adequate hydration and nutrition during recovery.

Supportive Care Measures

Beyond medications, excellent nursing care facilitates healing:


Isolate infected birds to contain spread of contagions. Cover cages to limit airborne transmission.

Nutritional Support

Well balanced diets with added vitamins A, C and E promote tissue repair. Zeolite supplements bind toxins.

Stress Reduction

Allow extra sleep/quiet time away from other pets and children. Soft music is soothing.

Follow Up Exams

Monitor case progress. Adjust medications as needed. Confirm infection clearance before discontinuing treatment.

Holistic protocols also complement conventional medical therapy.

Holistic Treatments

Various natural remedies boost immune response and expedite healing:


Herbal extracts exhibit antimicrobial, anti-inflammatory and immune modulating benefits:

  • Goldenseal – antibacterial/antifungal berberine alkaloids
  • Oregon Grape – antiseptic berberine, aids eye tissue repair
  • Echinacea – stimulates white blood cell production
  • Calendula – alleviates eye redness/swelling
  • Chamomile – calming anti-inflammatory remedy
  • Eyebright – plant compounds relieve eye irritation
  • Green Tea – supplies antioxidant EGCG compound

Diluted herbal eye drops or oral tinctures deliver active compounds.


Homeopathic remedies stimulate the body’s natural healing ability:

  • Belladonna – treats acute red, sore eyes
  • Hepar sulph – eye infections with thick yellow discharge
  • Pulsatilla – watery eyes worse in warm rooms
  • Euphrasia – relieves burning irritation


“Good bacteria” crowd out pathogens, improve digestion and nutrient absorption critical for immune response and speedy healing.

Colloidal Silver and Silver Nitrate Drops

Silver exhibits natural antibacterial, antiviral and anti-inflammatory properties without irritation or antibiotic resistance.

Vitamins and Minerals

Supplemental vitamins A, C, D3, E, and zinc promote immune cell production and skin/eye tissue regeneration. Antioxidants protect delicate eye structures.

Now let’s focus on proactive steps to help avoid infection in the first place.

Preventative Measures

While not every case can be prevented, the following measures substantially lower infection likelihood:

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Proper Hygiene Protocol

Prevent accumulation of bacteria, fungi and parasites:

  • Replace food/water daily
  • Disinfect food bowls/toy surfaces
  • Avoid wooden cages/perches
  • Frequently change cage lining
  • Rinse produce to limit pesticides

High Quality Diet

Support immune competency and organ function through:

  • Organic pellets/chop mixtures
  • Limited seed intake
  • Plentiful vegetables
  • Whole grains
  • Clean purified water

Reduce Stressors

Chronic stress impairs immunity. Provide:

  • Quiet sleeping quarters
  • Foraging toys
  • Companionship
  • Out of cage play time

Annual Wellness Exams

Have birds examined yearly regardless of apparent symptoms to identify issues early. Discuss supplemental nutrition.

While daunting when first noticed, most cockatiel eye infections are very treatable with attentive owner care and properly prescribed medication regimes. Even severe cases can often be cured and blindness prevented if rapidly addressed. Know your bird’s normal appearance and behavior so deviations raise red flags. Learn causes, symptoms, and treatment options. With proaction information and vigilance, cockatiels can enjoy excellent lifelong visual health!


Frequently Asked Questions

How long do cockatiel eye infections last?

With appropriate veterinary treatment, most bacterial or fungal eye infections clear within 2-4 weeks. More resistant viral infections may last 4-6 weeks. Without medication, infections tend to worsen and often lead to blindness.

When should I take my cockatiel to the vet for an eye issue?

Seek same or next day veterinary care if symptoms seem severe (profuse discharge, swollen shut eyes, blue tinting) or rapidly get worse. For milder symptoms, assess for 2-3 days but still contact your vet promptly for guidance. Catching infections early leads to better outcomes.

How much does it cost to treat a cockatiel eye infection?

Cost varies based on exam fees, testing, medications prescribed, and needed follow up care. Mild infections averaging $100-150 to treat. Moderate ones $200-300. Severe infections involving hospitalization and surgery can sometimes exceed $1000.

Can cockatiels fully recover vision after an eye infection?

Yes, if treatment begins before major eye damage occurs. However, some corneal scarring is permanent. With early intervention, most cockatiels regain close to normal vision, but it is still best to prevent infections.

Are eye infections in cockatiels contagious to humans?

Rarely. Simple conjunctivitis is not contagious to humans. Psittacosis, a bacterial Chlamydia infection, can occasionally spread to humans and cause flu-like illness. Seek medical care if you develop symptoms after handling an infected bird.

How to clean a cockatiel’s eyes?

Never try to manually clean eye area. Gently wipe feathers below the eyes with warm water on a cotton ball. Seek prompt veterinary assistance for evaluating and properly treating discharge or irritation rather than attempting to manage it yourself.

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