Cats
Open-mouth breathing is especially concerning in cats and should be treated as an emergency.
SYMPTOM → WHAT DO I DO?
Trouble breathing
Breathing difficulty is an emergency; minimize stress and seek care immediately.
EMERGENCY SIGNS REQUIRE IMMEDIATE CARE
READ THIS FIRST
Observations can help your veterinarian. They cannot rule out an emergency.
Contact an emergency veterinary facility immediately for difficult breathing, collapse, ongoing seizures, inability to urinate, major bleeding, abnormal gum color, sudden severe abdominal swelling or rapidly worsening weakness.
What could be behind this symptom?
These are possibilities, not a diagnosis. The right explanation depends on the examination, species and medical history.
- Airway obstruction, asthma, pneumonia or fluid around the lungs
- Heart failure, an allergic reaction, heat illness or trauma
- Toxin exposure, anemia or severe pain
- Species-specific airway disease, enclosure problems or poor water oxygenation
What can you safely check at home?
Write down what you see and bring photographs or video only when doing so does not delay care.
- Open-mouth breathing, exaggerated belly effort or an extended neck
- Blue, gray or pale gums or tongue
- Whether breathing is noisy, rapid, shallow or associated with collapse
- Recent heat, smoke, chemical, trauma or allergic exposures
Avoid actions that can make things worse.
- Do not force food, water or medication.
- Do not squeeze the chest, hold the mouth shut or over-handle the animal.
- Do not delay transport to film, search online or attempt home remedies.
- Do not place a struggling animal in a hot, poorly ventilated carrier.
When should you contact your veterinarian?
- Call the nearest appropriate emergency facility while preparing to leave.
- Keep the animal calm, cool and in a position that makes breathing easiest.
- Use species-appropriate transport and tell the clinic breathing distress is present.
Get emergency help immediately if you see:
- Open-mouth breathing in a cat, pronounced abdominal effort or inability to settle
- Blue, gray or pale gums, collapse or choking
- Bird tail bobbing, fish gasping at the surface or a large animal struggling for air
The same symptom can mean different things in different animals.
Birds
Tail bobbing, open-mouth breathing, neck stretching or inability to perch can indicate severe respiratory distress.
Aquatic animals
Check aeration, temperature, ammonia and nitrite immediately while contacting an aquatic veterinarian; multiple affected fish suggest a system emergency.
TRUSTED SOURCES
Sources behind this guidance
American Veterinary Medical AssociationFirst aid tips for pet owners and limits of home care ↗Merck Veterinary ManualVeterinary professional and pet-owner disease references ↗Merck Veterinary Manual: urinary obstructionWhy urinary blockage in cats requires immediate veterinary attention ↗
These educational resources support a conversation with your veterinary team. They do not replace examination, diagnosis or species-specific emergency care.