Airsacculitis in Geese: Causes, Signs, and Veterinary Care

Airsacculitis is inflammation of a goose's air sacs, which are delicate, balloon-like parts of the avian respiratory system. Birds do not breathe like mammals. Air moves through rigid lungs and a connected system of air sacs, so even mild swelling, debris, or infection can make breathing much harder than many pet parents expect.

In geese, airsacculitis is not one single disease. It is a finding that can happen with bacterial infection, fungal infection, inhaled irritants, or another illness that weakens the respiratory tract first. Merck notes that airsacculitis is a common lesion in poultry respiratory disease, including bacterial disease such as colibacillosis, while VCA explains that lower respiratory disease in birds can involve the lungs and air sacs and often needs prompt veterinary testing to identify the cause.

Some geese become sick very quickly, especially young birds, stressed birds, or birds living in damp, dusty, or poorly ventilated housing. Others show only subtle signs at first, like quieter honking, reduced appetite, or less interest in moving with the flock. Because birds often hide illness until they are quite sick, a goose with breathing changes should be treated as urgent.

Airsacculitis in geese usually develops when infection or irritation reaches the lower respiratory tract. Bacteria are a common cause. Merck describes airsacculitis as a typical lesion in avian colibacillosis caused by pathogenic E. coli, often after another problem has already stressed the airway. Other infectious agents can also set the stage for air sac disease, including respiratory viruses and organisms such as Bordetella avium, which Merck reports has been isolated from geese and can contribute to more severe secondary respiratory disease.

Fungal disease is another important cause, especially when birds are exposed to moldy litter, spoiled feed, damp bedding, or poor air quality. Merck and Cornell both note that aspergillosis is a respiratory disease that can affect lungs and air sacs, and Cornell specifically reports outbreaks in waterfowl exposed to moldy waste grain. In practical terms, geese housed in wet, dirty, dusty, or poorly ventilated areas face a higher risk.

Stress and husbandry problems often make infection more likely. Overcrowding, ammonia buildup from manure, sudden weather swings, transport, poor nutrition, and mixing birds from different sources can all weaken normal defenses. USDA APHIS also emphasizes that wild birds, contaminated water, footwear, equipment, and visitors can bring infectious organisms onto a property, so biosecurity matters for backyard flocks as much as larger operations.

Your vet will start with a physical exam and a close look at breathing effort, posture, body condition, hydration, and the flock history. Because many avian respiratory diseases look alike from the outside, diagnosis usually cannot be made by symptoms alone. VCA notes that birds with respiratory disease often need blood testing and additional diagnostics to identify whether the problem is bacterial, fungal, parasitic, or something else.

Depending on how stable your goose is, your vet may recommend bloodwork, choanal or tracheal swabs, bacterial culture, PCR testing, radiographs, ultrasound, or endoscopy. In birds, endoscopy can sometimes allow direct visualization of the air sacs and help collect samples. If a bird dies or is euthanized, necropsy can be very important for confirming the cause and protecting the rest of the flock.

Diagnosis also includes looking for the reason the goose became sick in the first place. Your vet may ask about bedding, ventilation, mold exposure, recent additions to the flock, access to ponds used by wild waterfowl, and any recent drop in appetite, growth, or egg production. That bigger picture helps guide treatment choices and prevention steps for the other birds.

Prevention starts with air quality and moisture control. Keep bedding dry, remove wet manure regularly, store feed so it stays clean and mold-free, and improve ventilation without creating constant drafts. Moldy litter and spoiled feed are important risk factors for fungal respiratory disease, and dusty, ammonia-heavy housing can irritate the airway and make infection more likely.

Biosecurity also matters. USDA APHIS recommends limiting visitors, cleaning footwear and equipment, washing hands before and after handling birds, and reducing contact between domestic birds and wild waterfowl. This is especially important for geese with access to ponds or outdoor areas where wild birds may leave droppings and contaminate water sources.

Quarantine new birds before mixing them with the flock, and monitor young or stressed geese closely for appetite changes, poor growth, or breathing noise. If one goose develops respiratory signs, contact your vet early rather than waiting for several birds to become sick. Fast action can reduce suffering, improve recovery, and help protect the rest of the flock.