Recognising a life-threatening emergency in dogs
A life-threatening emergency in a dog shows in objective signs, not in its complaints: blue or very pale gums, breathing that gives way, a dog that collapses, a swollen belly with retching that brings nothing up, a seizure that goes on. When in doubt, call the vet and set off: every minute counts.
Why an emergency is so hard to spot
A dog masks pain and weakness: for a pack species, showing vulnerability is a risk, so it keeps up appearances for as long as it can (WSAVA Global Pain Council consensus). Many seriously ill dogs will still take a treat or wag their tail right up until a late collapse. So 'he isn't complaining' does not mean 'there's nothing wrong'.
The vital markers to read on your dog
The colour of the gums is the most telling marker: it reflects oxygenation and circulation. Lift the lip and look.
Your point of comparison
Red flag, we call
On a dog with naturally black gums, look at the inside of the lip, the tongue or the eyelid.
Three more markers in ten seconds. None of them makes a diagnosis: they say 'we call'.
0 / 3The major emergencies, flag by flag
The breath that blocks
- Very fast, laboured, noisy breathing, mouth open with the flanks working.
- Neck stretched out, head low, elbows held away from the body: he stands this way to draw air in.
- Blue gums or tongue, or panting that won't stop at rest, with no heat or exertion.
The seizure that goes on
- A seizure lasting more than ~5 minutes, or seizures close together with no waking in between.
- Loss of consciousness, sudden disorientation, a dog circling or pressing its head against the walls.
The belly that swells and twists
- A swollen, hard belly, especially in a large, deep-chested dog.
- Attempts to retch that bring nothing up: he tries, nothing comes out, just drool.
- Restlessness, drooling, dullness: this is the classic picture of a twisted stomach, we go straight away.
The male straining without passing urine
- He takes the position, strains, whimpers, only a few drops come out or nothing, and he keeps returning to the same spot.
- A bladder that can no longer empty poisons the blood: this is a life-threatening emergency, not a fussy toileting habit.
The heat that overwhelms
- Frantic panting, thick drool, bright red gums.
- Staggering, vomiting, dullness.
- We cool first with cool water, then transport, even if he seems to be recovering.
The swallowed poison
- A dog seen near something toxic: antifreeze, rat poison, dark chocolate, xylitol, medication, a plant.
- A 'drunken' gait, trembling, vomiting, sudden drooling. Many poisons act silently: we call even with no symptoms.
The shock after an accident
- Knocked over, fallen from a height or bitten by a bigger dog: even if he 'looks fine', he must be seen, because internal bleeding can set in over the following hours.
- White gums, cold extremities, deep dullness: signs of shock.
The sudden swelling
- Face, muzzle or eyelids swelling quickly, often after a sting, a vaccine or a medication.
- In dogs, a severe allergy often shows through the gut and the circulation: vomiting, diarrhoea, pale gums, weakness, collapse.
Faced with one of these red flags, or simply when in doubt, the reflex is always the same: call and go, without waiting for it 'to pass'.
- Make the scene and yourself safe: a dog in pain may bite, even the one it adores.
- Quickly check the vital markers: gum colour, breathing, ability to stand.
- Call the vet, the on-call clinic or an animal poison-control centre ON THE WAY, not on arrival: the team gets ready to receive you and guides you.
- Transport him calmly, without forcing his position or muzzling him if he is panting or vomiting.
The assistant never replaces a vet. When in doubt, call.
The best emergency is the one you've prepared for: note down in advance the number of your on-call clinic and of an animal poison-control centre (in France, the CNITV in Lyon and the CAPAE-Ouest in Nantes), work out the route, 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 management of poisoning, ASPCA Animal Poison Control Center (APCC) ; Pet Poison Helpline
- Consensus on veterinary emergency care and CPR, RECOVER Initiative (ACVECC / VECCS) (2024)
- Pet first aid, AVMA ; American Red Cross
Frequently asked questions
How can I tell if my dog has been poisoned?
Many poisons act silently: your dog can seem normal for hours. The warning signs are a 'drunken' gait, trembling, vomiting, sudden drooling or dullness. If you've seen 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. Don't make him vomit: it's the vet who decides.
What do I do when a dog is choking?
First, tell the difference: a dog that coughs and is still breathing is not choking. True obstruction means panic, paws brought 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, upwards, for one to two minutes. If the object doesn't come out, get to the vet without delay.
Why is my dog having seizures?
A seizure is not a disease in itself, it's a signal. The causes range from epilepsy to low blood sugar (especially in a puppy or a very small dog), through poisoning (xylitol, metaldehyde slug pellets), heatstroke or a neurological disorder. A single, brief seizure already warrants advice; a seizure lasting more than 5 minutes, or seizures close together, is a life-threatening emergency.
What do I do while my dog is having a seizure?
During the seizure, your dog isn't conscious: you can't stop it by hand, your job is to protect him. Move hard objects away, slip a cushion under his head, lower the light and noise, and keep your hands away from his mouth (he may bite by reflex, he won't swallow his tongue). Time it, film it if you can for the vet, then call. Beyond 5 minutes, we go straight away.
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 your dog's weight. Keep the packaging and call your vet or a poison-control centre, without waiting for symptoms (restlessness, trembling, vomiting). Don't make him vomit on your own initiative.
Which signs should make me 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 goes on, or a suspected ingestion of something toxic. Faced with one of these signs, or when in doubt, you call and you go: a trip for nothing is always better than a delay.
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