Cockatiel Liver Disease: Yellow Droppings, Signs & Treatment
Liver disease is common in cockatiels and frequently causes vague signs — ruffled feathers, tail bobbing, weight loss — that owners attribute to old age or stress. Yellow-green urates in the droppings are an important clue that warrants same-day exotic vet evaluation.
Last reviewed: June 2026
Why Cockatiels Are Prone to Liver Disease
The avian liver is the metabolic hub for lipid processing, protein synthesis, detoxification, and vitamin storage. Cockatiels on seed-only diets are prone to hepatic lipidosis (fatty liver disease) because seeds are high in fat and deficient in key nutrients. Other causes include chlamydiosis (psittacosis — Chlamydia psittaci infection), heavy metal toxicosis (lead, zinc), herpesvirus, and hemochromatosis (iron storage disease).
As described in Carpenter's Exotic Animal Formulary, liver disease in psittacines (parrots and related birds) is one of the most frequently encountered conditions in avian practice and a common finding on post-mortem examination of cockatiels that appeared to die "suddenly."
The AAV Basic Care for Companion Birds, 2019 emphasizes annual wellness exams including blood work for mature cockatiels as the primary tool for early detection of liver disease before clinical signs develop.
Signs of Liver Disease in Cockatiels
Droppings changes (most specific early sign):
- Yellow-green urates — the white/cream portion of droppings turning yellow or bright green indicates biliverdin accumulation from liver dysfunction
- Abnormally green feces (separate from green-colored urates)
- Increased water in droppings (polyuria)
General signs:
- Ruffled feathers, hunched posture, tail bobbing (these indicate any serious illness in birds)
- Lethargy — reduced activity, sleeping more during daytime
- Weight loss — weigh your cockatiel weekly; a loss of 10% body weight is significant
- Reduced appetite
- Regurgitation
Advanced signs:
- Abdominal distension (ascites from liver failure)
- Labored breathing (ascites pressing on air sacs)
- Bleeding from minor injuries (the liver produces clotting factors)
Note on tail bobbing: Bobbing of the tail with each breath in a bird at rest indicates significant respiratory effort — always an urgent sign in cockatiels.
Diagnosis
- Blood work (complete blood count + biochemistry) — AST and GGT are key liver enzymes in birds; elevated bile acids are sensitive and specific for liver dysfunction
- Bile acid test (fasted and post-feeding) — best functional assessment of liver health in birds
- Radiographs — assess liver size; hepatomegaly (enlarged liver) is often visible on X-ray
- Ultrasound — assess liver texture; guide biopsy
- Liver biopsy — definitive diagnosis of the type of liver disease; guides specific treatment
Treatment
Treatment depends on the underlying cause:
- Hepatic lipidosis: Dietary conversion from seed-only to a balanced pelleted diet supplemented with fresh vegetables is central. Supportive care includes milk thistle (silymarin), SAMe, vitamin E (hepatoprotective supplements). Severe cases require tube feeding with a high-protein balanced diet.
- Chlamydiosis: Doxycycline for 45 days (oral or injectable); the bird must be isolated and the owner informed of zoonotic risk. Psittacosis is a notifiable disease in most US states.
- Heavy metal toxicosis: chelation therapy (calcium EDTA, dimercaptosuccinic acid); remove the metal source from the environment
- Supportive care for all forms: fluids, warmth, anti-nausea medication, nutritional support
Dietary correction from seeds to pellets is the single most impactful long-term intervention for hepatic lipidosis.
Cost: exotic vet visit with blood work and radiographs typically costs $200–500. Liver biopsy under anesthesia adds $400–800. Long-term medication and dietary management: $50–200/month.
When to See a Vet
Call your vet today if:
- Your cockatiel's droppings have yellow-green urates (the urate part, not the feces)
- Your bird is ruffled, less active, or sleeping more during the day
- You've noticed weight loss or reduced interest in food
Go to the ER immediately if:
- Your cockatiel's tail is bobbing with every breath at rest
- The bird is on the bottom of the cage and cannot perch
- Breathing is audible or labored
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Frequently Asked Questions
What do normal cockatiel droppings look like vs. liver disease? Normal droppings have three parts: dark green to brown feces, clear to slightly white liquid urine, and white to cream-colored urates. In liver disease, the urate portion turns yellow or bright lime green from biliverdin. A single abnormal dropping can be from diet or stress; persistent yellow-green urates over 12–24 hours warrant a vet call.
Can a seed diet cause liver disease in cockatiels? Yes — seed-only diets are the leading dietary cause of hepatic lipidosis in cockatiels. Seeds are high in fat and deficient in vitamins A, D, and E. Conversion to a high-quality pellet diet as the dietary base dramatically reduces hepatic lipidosis risk and improves overall longevity.
How much does cockatiel liver disease treatment cost? An exotic vet visit with blood work and radiographs typically costs $200–500. If a liver biopsy is needed, add $400–800. Doxycycline treatment for psittacosis runs $50–150 for a 45-day course. Long-term dietary supplements and monitoring add $50–200/month.
Is psittacosis (chlamydiosis) contagious to humans? Yes — Chlamydia psittaci is a zoonotic pathogen. Humans exposed to infected bird droppings or respiratory secretions can develop psittacosis, presenting as flu-like illness or pneumonia. Proper hygiene (mask, gloves when cleaning cages), ventilation, and treatment of the bird reduces human risk. Psittacosis in humans is treated with doxycycline.
How can I tell if my cockatiel is losing weight? The best method is weekly weighing on a digital kitchen scale. A healthy adult cockatiel weighs 80–120 g; a loss of more than 10 g (roughly 10%) warrants veterinary attention. Feel the keel bone (the ridge running down the center of the chest): a prominent, sharp keel indicates significant muscle wasting — a sign of severe malnutrition or chronic illness.
Still Not Sure if Your Cockatiel Needs a Vet?
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