Spotting a life-threatening emergency in your dog
A life-threatening emergency in a dog shows up in precise signs: blue or very pale gums, breathing that fails, a dog who collapses, a swollen belly with retching that brings nothing up, a seizure that will not stop. If in doubt, call the vet and set off: every minute counts.
Why an emergency is so hard to see
Dogs mask pain and weakness. In dogs, pain very often goes under-detected, a finding that led the World Small Animal Veterinary Association (WSAVA) to publish dedicated guidelines. Plenty of seriously ill dogs will still take a treat or wag their tail, right up to the moment they collapse, often late. So “he isn't complaining” does not mean “there's nothing wrong”.
The vital signs to read on your dog
Gum colour is the most telling sign: it tells you straight away how oxygen levels and circulation are doing. Lift the lip and look.
Your baseline
Red flag: call now
On a dog with naturally black gums, look instead at the inside of the lip, the tongue or the eyelid.
Three other things to check. None of them makes a diagnosis: they simply tell you “call”.
0 / 3The eight big emergencies to recognise
Breathing that seizes up
- Breathing that is very fast, laboured, noisy, mouth open with the flanks working hard.
- Neck stretched out, head low, elbows held away from the body: he stands like that to get air in.
- Blue gums or tongue, or panting that doesn't stop at rest, with no heat and no exercise behind it.
The seizure that won't stop
- A seizure that won't stop, or seizures close together with no return to consciousness in between. Past five minutes, the brain is damaged. Don't wait that long to call.
- Loss of consciousness, sudden disorientation, a dog who circles or presses his head against the walls.
The belly that swells and twists
- A swollen, hard belly, especially in a big deep-chested dog.
- Retching that brings nothing up: he tries, nothing comes, just drool.
- Restlessness, drooling, dullness: that's the picture of gastric torsion. Set off straight away, without calling from home first. Without surgery, it kills within hours.
The male who strains without passing urine
- He takes up the position, strains, whines, produces a few drops or nothing at all, and keeps going back to the same spot.
- A bladder that no longer empties poisons the blood: this is a life-threatening emergency, not fussiness about where to go.
Heat that overwhelms him
- Frantic panting, thick drool, bright red gums.
- Staggering, vomiting, dullness.
- Cool him down with cool water first, then take him in, even if he seems to be recovering.
The poison swallowed
- Dog seen near something toxic: antifreeze, rat poison, dark chocolate, xylitol, medication, a plant.
- A “drunken” gait, tremors, vomiting, sudden drooling. Many poisonings stay silent for several hours: call even with no symptoms.
Shock after an accident
- Hit by a car, fallen from a height or bitten by a bigger dog: even if he “seems fine”, he needs to be seen, because internal bleeding can declare itself in the hours that follow.
- White gums, cold extremities, deep dullness: signs of shock.
The sudden swelling
- Face, muzzle or eyelids swelling fast, often after a sting, a vaccine or a medication.
- In dogs, a severe allergic reaction often goes through the gut and the circulation: vomiting, diarrhoea, pale gums, weakness, collapse.
Faced with one of these red flags, or simply in doubt, the response is always the same: call and set off, without waiting for it to “pass”.
Do this right now
- Get everyone safe, yourself first: a dog in pain can bite, even the person he adores.
- Take a quick look at the vital signs: gum colour, breathing, whether he can stand.
- Call the vet, the out-of-hours clinic or an animal poison control centre on the way, not on arrival: the team gets ready for you and talks you through it.
- Move him calmly, without forcing him into a position and without muzzling him if he's panting or vomiting.
The assistant never replaces a vet. When in doubt, call.
The best emergency is the one you prepared for in advance: note down the number of your out-of-hours clinic and that of an animal poison control centre. There are only two in France, the CNITV in Lyon and the CAPAE-Ouest in Nantes, and they are phone numbers: you can call them from wherever you are. Work out the route to your clinic too, and keep a carrier and the health record within reach.
- Guidelines for the recognition, assessment and treatment of pain, WSAVA Global Pain Council (2022)
- Charalambous et al. — ACVIM Consensus Statement on status epilepticus and cluster seizures in dogs (2024)
- Hall et al. — Risk factors for heat-related illness in dogs (VetCompass) (2020)
- Veterinary toxicology and what to do in case of poisoning, ASPCA Animal Poison Control Center (APCC) ; Pet Poison Helpline
- Pet first aid, AVMA ; American Red Cross
Going further
Frequently asked questions
How do I know if my dog has been poisoned?
Many poisons work silently: your dog can seem normal for hours. What should alert you: a “drunken” gait, tremors, vomiting, sudden drooling or dullness. If you saw him near something toxic (antifreeze, rat poison, dark chocolate, medication, a plant) or a tablet is missing, call your vet or a poison control centre straight away, even with no symptoms, with the packaging to hand. Don't make him vomit: that's the vet's call.
What should I do when a dog is choking?
First, tell the difference: a dog who is coughing and still breathing is not choking. Real obstruction means panic, paws going to the mouth, abnormal noises and gums turning blue. Never put your fingers blindly down the back of the throat. If he really is suffocating, get behind him and give a few firm thrusts just below the ribs, angled upwards. If the object doesn't come out straight away, get to the vet without waiting.
Why is my dog having seizures?
A seizure isn't an illness in itself, it's a signal. Causes range from epilepsy to low blood sugar (especially in puppies or very small dogs), and include poisoning (xylitol, metaldehyde slug pellets), heatstroke or a neurological problem. A single short seizure already deserves veterinary advice; a seizure lasting more than 5 minutes, or seizures close together, is a life-threatening emergency.
What should I do while my dog is having a seizure?
During the seizure your dog isn't conscious: you can't stop it with your hands, your job is to protect him. Move hard objects away, slide a cushion under his head, turn down the light and the noise, and keep your hands away from his mouth (he may bite by reflex, and he won't swallow his tongue). Time it, film it if you can for the vet, then call. Past 5 minutes, head straight to the vet.
My dog has eaten chocolate, should I be worried?
Dark chocolate, cocoa and baking chocolate are far more dangerous than milk chocolate, and the risk depends on the amount and on your dog's weight. Keep the packaging and call your vet or a poison control centre, without waiting for symptoms (restlessness, tremors, vomiting). Don't make him vomit off your own bat.
Which signs mean I should rush to the emergency vet?
Blue, grey or very pale gums, difficult or noisy breathing, collapse or an inability to stand, a swollen belly with retching that brings nothing up, a male straining without managing to pass urine, a seizure that won't stop, or a suspected swallowing of something toxic. Faced with any of these signs, or in doubt, call and set off: a trip for nothing always beats a delay.
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