Cockatiels are prey animals that hide illness until they are critically ill — respiratory infections can be advanced before obvious signs appear. Tail bobbing during breathing, open-mouth breathing, or clicking sounds are serious warning signs requiring same-day veterinary attention. Some cockatiel respiratory infections, including psittacosis, can spread to humans.
Last reviewed: June 2026
Why Respiratory Infections Are Dangerous in Cockatiels
Cockatiels and other prey animals suppress outward signs of illness until disease is severe, because displaying weakness invites predation in the wild. By the time a cockatiel looks obviously unwell — fluffed feathers, closed eyes, tail bobbing on the cage floor — the underlying condition is often well advanced. Respiratory infections are particularly dangerous because the avian respiratory system is anatomically unique: birds have air sacs that penetrate deep into their body cavity, bones, and abdomen, meaning infection can rapidly spread beyond the lungs to systemic illness. As described in Carpenter's Exotic Animal Formulary, treatment delays in sick birds beyond 12–24 hours of noticeable decline significantly worsen outcomes.
The most important pathogens causing respiratory disease in cockatiels include Chlamydophila psittaci (causing psittacosis, also known as parrot fever — a zoonotic disease transmissible to humans), Mycoplasma, Aspergillus (fungal air sacculitis), and various respiratory viruses. The AAV Basic Care for Companion Birds, 2019 recommend that any new cockatiel undergo health screening at an avian vet within the first week of acquisition, since subclinical Chlamydophila carriage is common in birds from pet stores and aviaries.
Signs of Respiratory Infection
Recognizing subtle early signs is critical:
Subtle early signs:
- Tail bobbing at rest — the tail moves rhythmically with each breath, indicating labored breathing
- Sleeping more than usual or fluffed during the day
- Slightly decreased activity, less vocalization
- Subtle changes in droppings — urate portion (white part) turning yellow-green
More obvious signs:
- Audible wheezing, clicking, or crackling sounds when breathing
- Nasal discharge — clear, mucoid, or crusty discharge around the nares
- Open-mouth breathing, stretching the neck upward
- Wet or stained feathers around the cere from nasal discharge
- Weight loss (best monitored by weekly weighing on a kitchen scale)
Emergency signs:
- Resting on the cage floor
- Completely fluffed with eyes closed
- Gasping or extreme respiratory distress
The AEMV Pet Care Guides, 2024 recommend weighing pet birds weekly — a consistent weight loss of 5–10% often precedes visible respiratory or systemic signs by days.
Diagnosis and Treatment
Diagnosis involves physical examination (auscultation of airways, assessment of body condition), blood work (CBC, chemistry, uric acid), Chlamydophila PCR (nasal, choanal, or cloacal swab), culture and sensitivity, and chest/air sac radiographs. Endoscopy allows direct visualization of air sacs if aspergillosis is suspected.
Treatment varies by cause: doxycycline (oral or injectable) for Chlamydophila for 45 days minimum; voriconazole or itraconazole for Aspergillus; azithromycin or enrofloxacin for bacterial infections. Supportive care includes supplemental heat (maintain ambient temperature at 30–32°C for sick birds), fluid support, and nutritional support via crop feeding if the bird is not eating.
When to See a Vet
Call your vet today if:
- You notice tail bobbing when your cockatiel is at rest
- Your cockatiel is sleeping more than usual during daylight hours
- Any nasal discharge has appeared around the nares
- Vocalization has significantly decreased
Go to the ER immediately if:
- Your cockatiel is on the cage floor or cannot perch
- Open-mouth breathing or gasping is occurring
- Completely fluffed and unresponsive to your approach
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Frequently Asked Questions
Can my cockatiel's respiratory infection spread to me?
Yes — Chlamydophila psittaci (psittacosis/parrot fever) can spread to humans via inhalation of dried feces, feather dust, or nasal secretions from infected birds. In humans it causes a flu-like illness that can progress to pneumonia. Immunocompromised individuals, children, and elderly family members are at higher risk. Wear a mask when cleaning the cage of a bird confirmed or suspected to have Chlamydophila, and inform your doctor if you develop respiratory symptoms after exposure.
How much does treating cockatiel respiratory infection cost?
An avian exam costs $100–200. Blood work and Chlamydophila PCR run $150–300. Radiographs add $150–300. Doxycycline for a 45-day course costs $30–60. Hospitalization for a critically ill bird runs $200–500/day at avian specialty practices. A mildly ill bird treated as an outpatient typically totals $400–800 for diagnosis and a complete antibiotic course.
How do I keep my cockatiel warm when it is sick?
Maintain the bird's environment at 30–32°C (86–90°F) by positioning a heat lamp or ceramic heat emitter to warm one end of the cage, leaving the other end cooler so the bird can self-regulate. Never use heating pads inside the cage — they risk burns. Monitor for panting (too hot) or continued huddling and shivering (still too cold).
How do I prevent respiratory infections in my cockatiel?
Quarantine new birds for 30 days and obtain a health certificate from an avian vet before introduction to existing birds. Maintain excellent ventilation without drafts. Avoid aerosol sprays, scented candles, and cooking fumes (especially overheated non-stick cookware, which releases PTFE fumes fatal to birds). Provide a nutritionally balanced diet to support immune function.
How does my vet test for Aspergillus (fungal infection)?
Aspergillus diagnosis involves a combination of clinical signs, imaging (radiographs showing cloudy or thickened air sacs), blood work (elevated white blood cells, elevated protein), and serology (Aspergillus antibody titer). Definitive diagnosis often requires endoscopic visualization of characteristic white fungal plaques in the air sacs. Antifungal treatment is prolonged (weeks to months) and expensive.
Still Not Sure if Your Cockatiel Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share a short video of your cockatiel's breathing pattern (especially tail bobbing), or a close-up of any nasal discharge, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.