Rabbit Pneumonia: Signs of Severe Lower Respiratory Disease in Rabbits
- See your vet immediately if your rabbit has open-mouth breathing, fast or labored breathing, blue-tinged gums, severe lethargy, or stops eating.
- Rabbit pneumonia is a lower airway or lung infection or inflammation. It can develop after an upper respiratory infection such as pasteurellosis, after aspiration, or with severe systemic illness.
- Common signs include increased breathing effort, nasal discharge, noisy breathing, fever, weakness, weight loss, and reduced appetite. Rabbits often do not cough much, even with serious lung disease.
- Diagnosis often includes an exam, chest X-rays, and testing of nasal or airway samples. Some rabbits also need blood work, oxygen support, fluids, and assisted feeding.
- Typical 2025-2026 US cost range is about $250-$700 for outpatient workup and medications, or $1,200-$3,500+ if hospitalization, oxygen therapy, imaging, and intensive support are needed.
What Is Rabbit Pneumonia?
Rabbit pneumonia means inflammation and infection in the lower respiratory tract, including the small airways and lungs. This is more serious than a mild "snuffles" case affecting only the nose. In rabbits, lower respiratory disease can reduce oxygen delivery quickly, and a rabbit that seems only quiet or off food may already be quite sick.
Bacteria are a common cause, especially when an upper respiratory infection spreads deeper into the chest. Pasteurella multocida is one of the organisms most often linked with rabbit respiratory disease, but mixed infections can occur. Pneumonia may also develop after aspiration, severe dental disease, environmental irritation, or less commonly fungal, viral, or parasitic disease.
Rabbits are prey animals and often hide illness until they are struggling. They also may not cough the way dogs or people do, so pet parents can miss the seriousness of lung disease. If your rabbit is breathing harder than normal, sitting hunched, or refusing food, treat that as urgent and contact your vet right away.
Symptoms of Rabbit Pneumonia
- Fast breathing or visibly increased effort to breathe
- Open-mouth breathing or stretching the neck to breathe
- Noisy breathing, wheezing, or harsh respiratory sounds
- Nasal discharge, sometimes thick or pus-like
- Eye discharge along with respiratory signs
- Reduced appetite or complete refusal to eat
- Lethargy, weakness, or hiding more than usual
- Weight loss or muscle loss over days to weeks
- Fever or feeling unusually warm, though some very sick rabbits may become cold
- Exercise intolerance or tiring quickly
- Blue, gray, or pale gums in severe cases
- Minimal or absent coughing despite serious disease
Mild upper respiratory disease can start with sneezing and discharge, but pneumonia is more concerning when breathing becomes faster, deeper, or more effortful. A rabbit that stops eating, sits still in a hunched posture, or seems too weak to move normally may be dealing with more than a simple nose infection.
See your vet immediately if you notice open-mouth breathing, blue-tinged gums, collapse, severe weakness, or a rabbit that will not eat. In rabbits, trouble breathing is always an emergency.
What Causes Rabbit Pneumonia?
Bacterial infection is the most common cause discussed in pet rabbits. Pasteurella multocida is a major concern, and rabbits can also have mixed bacterial infections. In some cases, a rabbit starts with nasal discharge and sneezing, then the infection tracks into the lower airways and lungs. Untreated respiratory disease can become severe and may be fatal.
Pneumonia can also happen when material is inhaled into the lungs. This is called aspiration and may occur with swallowing problems, force-feeding mistakes, severe weakness, or other illness. Dental disease can contribute too, because tooth root disease and chronic nasal inflammation can affect nearby structures and make respiratory infection harder to clear.
Less common causes include fungal, viral, or parasitic disease, as well as inhaled irritants such as smoke, poor ventilation, dusty bedding, or chemical fumes. Stress, crowding, poor sanitation, and underlying illness can weaken a rabbit's defenses and make lower respiratory disease more likely.
How Is Rabbit Pneumonia Diagnosed?
Your vet will start with a careful history and physical exam, paying close attention to breathing effort, lung sounds, hydration, body temperature, and appetite. Because rabbits can decline quickly, some need stabilization with oxygen before a full workup is completed.
Chest X-rays are one of the most useful next steps because they can show lung changes, fluid patterns, abscesses, or other chest problems. Your vet may also recommend blood work to look for inflammation, dehydration, or other organ stress. If there is nasal or eye discharge, a swab for culture and antibiotic sensitivity may help guide treatment, although upper airway samples do not always tell the whole story in lower airway disease.
Depending on the case, your vet may also discuss PCR testing for respiratory pathogens, skull imaging if dental disease is suspected, or more advanced airway sampling in referral settings. The goal is not only to confirm pneumonia, but also to identify the likely cause and how sick your rabbit is right now.
Treatment Options for Rabbit Pneumonia
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Urgent exam with pulse oximetry or basic respiratory assessment when available
- Chest X-rays if financially feasible, or treatment based on exam findings when imaging is declined
- Rabbit-safe oral medications chosen by your vet, often including an antibiotic and supportive pain or anti-inflammatory care when appropriate
- Subcutaneous fluids if mildly dehydrated
- Syringe-feeding or recovery diet support if appetite is reduced
- Home nursing instructions for warmth, low-stress housing, hydration, and close monitoring
Recommended Standard Treatment
- Urgent exam and chest X-rays
- Blood work and targeted respiratory testing when indicated
- Culture or PCR testing from nasal discharge or other samples when possible
- Initial in-hospital stabilization, often including oxygen support or nebulization
- Rabbit-safe antibiotics selected by your vet and adjusted if test results return
- Fluid therapy, assisted feeding, and recheck imaging or exams as needed
Advanced / Critical Care
- Emergency stabilization and hospitalization, often 24-hour monitoring
- Oxygen cage or oxygen supplementation, nebulization, and intensive nursing care
- IV fluids, nutritional support, and frequent reassessment of temperature, hydration, and breathing effort
- Full imaging workup, including repeat chest X-rays and additional imaging if dental disease, abscesses, or aspiration are suspected
- Advanced sampling or referral-level diagnostics when available
- Management of complications such as severe anorexia, sepsis, GI slowdown, or concurrent disease
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Rabbit Pneumonia
Bring these questions to your vet appointment to get the most out of your visit.
- Does my rabbit seem stable enough for home care, or do you recommend hospitalization today?
- What findings make you think this is pneumonia instead of only an upper respiratory infection?
- Would chest X-rays change the treatment plan in my rabbit's case?
- Do you suspect a bacterial infection such as Pasteurella, aspiration, dental disease, or something else?
- Which medications are safest for rabbits, and what side effects should I watch for at home?
- How much and how often should I assist-feed if my rabbit is eating poorly?
- What signs mean my rabbit is getting worse and needs emergency recheck right away?
- What is the expected cost range for the options you recommend today?
How to Prevent Rabbit Pneumonia
Good prevention starts with fast attention to early respiratory signs. Sneezing, nasal discharge, eye discharge, reduced appetite, or noisy breathing should not be brushed off in rabbits. Early treatment of upper respiratory disease may reduce the chance that infection spreads into the lungs.
Keep your rabbit's environment clean, dry, well ventilated, and low in dust. Avoid cigarette smoke, aerosol sprays, strong cleaners, and bedding that creates heavy airborne particles. Quarantine new rabbits before introducing them, and wash hands, bowls, and equipment between animals if one rabbit is ill.
Routine wellness visits matter too. Dental disease, chronic stress, obesity, poor nutrition, and underlying illness can all make respiratory problems harder to control. Ask your vet whether your rabbit should receive rabbit hemorrhagic disease vaccination based on your region and risk, since severe viral disease can include respiratory signs and can spread rapidly among rabbits.