Dog Breathing Fast and Vomiting: Causes and What to Do
The combination of rapid breathing and vomiting in a dog can range in seriousness from a self-limiting episode to a life-threatening emergency. This article covers the possible explanations, the warning signs to watch for, and guidance on when to contact a veterinarian.
Published: 2026-07-29 | Updated: 2026-07-29 | Reading time: 7 min
Quick Answer
Fast breathing and vomiting occurring together can be associated with several conditions, including gastrointestinal upset, toxin ingestion, heatstroke, and gastric dilatation-volvulus (GDV, or bloat). Some of these are emergencies. If your dog's abdomen appears swollen and hard, if the vomiting is repeated and unproductive, or if the dog appears distressed or is collapsing, seek immediate veterinary care. When in doubt, it is always safer to contact a veterinarian.
SYMPTOM TRIAGE
Answer a few questions about your dog's signs and receive general guidance on how urgently to seek veterinary care.
This tool does not diagnose conditions or replace a veterinarian.
Potential Causes of Fast Breathing and Vomiting
Gastric Dilatation-Volvulus (Bloat)
GDV is a life-threatening emergency in which the stomach fills with gas and may rotate on its axis. This condition is most common in large and deep-chested breeds such as Great Danes, German Shepherds, Standard Poodles, and Weimaraners, but can occur in any dog. Signs may include:
- A visibly swollen or distended abdomen that feels firm or hard
- Non-productive retching or attempts to vomit without producing anything
- Restlessness, pacing, and inability to settle
- Rapid breathing, panting, or open-mouth breathing
- Pale gums
- Rapid deterioration
GDV requires immediate surgical intervention. Delays in treatment can be fatal.
Toxin Ingestion
Ingesting a toxic substance can cause both vomiting and rapid breathing, depending on the substance. Common toxins that dogs may encounter include:
- Chocolate, xylitol, grapes, and raisins
- Certain human medications (ibuprofen, paracetamol, antidepressants)
- Household chemicals, rodenticides, or insecticides
- Toxic plants (lilies, sago palm, oleander)
Some toxins affect the nervous system, which can alter breathing patterns, while others irritate the gastrointestinal tract and cause vomiting. If you suspect your dog has ingested something toxic, contact a veterinarian or a poisons information service immediately.
Heatstroke
Heatstroke occurs when a dog's body temperature rises to a dangerous level, typically due to exposure to high temperatures or vigorous activity in hot conditions. Signs of heatstroke can include:
- Excessive panting that progresses to laboured or irregular breathing
- Vomiting or diarrhoea
- Bright red or very dark gums, or dry and sticky gums
- Staggering, disorientation, or collapse
- Seizures in severe cases
Heatstroke is a medical emergency. Moving the dog to a cool area, offering small amounts of water, and seeking veterinary care as quickly as possible are important steps.
Gastrointestinal Infection or Inflammation
Infections of the digestive tract (gastroenteritis) caused by bacteria, viruses, or parasites can lead to vomiting. If the dog is also feverish or in pain, the respiratory rate may increase. Additional signs can include diarrhoea, reduced appetite, and lethargy. Many cases of gastroenteritis resolve with supportive veterinary care.
Respiratory Infection with Secondary Nausea
Respiratory infections such as kennel cough or pneumonia can cause coughing, which may trigger gagging or vomiting. A dog that is coughing forcefully and frequently may swallow mucus that irritates the stomach, leading to vomiting. In these cases, the primary sign is usually respiratory, with vomiting occurring as a secondary response.
When This Is an Emergency
Contact a veterinarian or an emergency veterinary clinic immediately if any of the following are present alongside fast breathing and vomiting:
- A swollen, hard, or distended abdomen
- Repeated, unproductive attempts to vomit (dry retching)
- Collapse, inability to stand, or severe weakness
- Pale, blue-tinged, or very dark gum colour
- Rapid deterioration over minutes to hours
- Known or suspected ingestion of a toxic substance
- Signs of heatstroke after exposure to high temperatures
These situations can worsen quickly, and early veterinary intervention can be critical.
Non-Emergency Situations
In some cases, the combination of fast breathing and vomiting may be less urgent, for example:
- A single episode of vomiting after eating too quickly, with breathing returning to normal once the dog settles
- Mild gastrointestinal upset with no additional signs, in a dog that remains bright and alert
- Motion sickness during or shortly after travel
Even in less urgent situations, it is advisable to monitor the dog closely and consult a veterinarian if vomiting recurs or the dog's condition changes.
When to Contact a Veterinarian
Seek veterinary attention when:
- Vomiting occurs more than once in a short period
- The dog cannot keep water down
- Fast breathing continues after the vomiting has stopped
- The dog appears lethargic, painful, or distressed
- Any of the emergency signs described above are present
If you are uncertain about the severity of the situation, the symptom triage tool can provide general guidance on how urgently to seek care.
Frequently Asked Questions
Can coughing cause a dog to vomit?
Yes. Forceful coughing can trigger the gag reflex and lead to vomiting. This is relatively common in dogs with kennel cough, tracheal collapse, or chronic bronchitis. If coughing appears to be the primary sign and the dog is otherwise well, a veterinary consultation can help determine the underlying cause.
What should I do if I think my dog has bloat?
Bloat (GDV) is a medical emergency. Contact a veterinary clinic or emergency hospital immediately. Do not attempt to relieve the condition at home. Time is critical, and surgical intervention is typically required.
Can a dog vomit from stress?
Stress and anxiety can contribute to gastrointestinal upset in some dogs, potentially leading to vomiting. Stress may also cause fast breathing. If the vomiting is occasional, the dog is otherwise healthy, and the episodes correlate with stressful events, a veterinarian or veterinary behaviourist may be able to help with management strategies.
Is it safe to wait and see if the vomiting stops?
A single episode of vomiting in an otherwise bright and alert dog may resolve on its own. However, when vomiting is combined with fast breathing, the situation warrants closer attention. If the dog shows any emergency signs, appears distressed, or the vomiting persists, veterinary care should not be delayed.
SYMPTOM TRIAGE
If your dog is breathing fast and vomiting, use the symptom triage tool to assess the situation and receive general guidance on whether to seek urgent or routine veterinary care.
Sources
- Merck Veterinary Manual: "Gastric Dilation and Volvulus" and "Heatstroke"
- American Kennel Club (AKC): "Bloat in Dogs" and "Heatstroke in Dogs"
- VCA Animal Hospitals: "Vomiting in Dogs" and "Gastric Dilatation-Volvulus (GDV)"
- ASPCA Animal Poison Control Center: "Poisonous Substances"
Disclaimer
This article and the PawAI Symptom Triage tool provide general educational information only. They cannot examine your pet, make a diagnosis, or replace advice from a licensed veterinarian. Contact a veterinarian promptly if symptoms are severe, worsening, persistent, or accompanied by emergency warning signs.