The Canine Ledger

Is This an Emergency? A Plain Guide to Your Dog's Symptoms

The signs that mean go to a vet now, what to do if your dog ate something, and where to start for everything that can wait until morning.

Written by thecanineledger

1. Start where you are

If you are…Start here
Worried your dog needs help right now§2: Go now: the emergency signs
Sure your dog has eaten something it shouldn’t have§3: If your dog ate something
Dealing with vomiting, diarrhoea or a dog off their food§4: Vomiting, diarrhoea and not eating
Looking at itching, sore ears or a limp§5: Itching, ears and limping
Noticing your dog is acting differently§6: When behaviour changes
Wondering how this section decides what’s urgent§7: How this section works

2. Go now: the emergency signs

If your dog has any of these, phone a vet or an emergency clinic now and tell them you are on your way. Don’t wait to see whether it passes, and don’t spend the time reading.

  • Trouble breathing.
  • Collapse, or your dog can’t stand.
  • Severe or uncontrolled bleeding.
  • Severe pain.
  • A swollen, tight belly, or retching that brings nothing up, especially in a large or deep-chested dog. This can be bloat.
  • Straining to pee with little or no urine coming out, especially in a male dog. This can be a blockage.
  • A seizure that lasts more than five minutes, or seizures that come one after another.
  • Sudden weakness or wobbliness in the back legs, or sudden back pain.
  • Hot skin, heavy panting, drooling, staggering or collapse in warm weather, or after exercise. This can be heatstroke.
  • A painful, red or cloudy eye, or an eye injury.
  • A suspected broken bone, or a leg your dog can’t move.
  • Poisoning, or anything you think might be poisonous. See §3.

Most of that list comes straight from the Merck Veterinary Manual’s owner guidance. It lists poisoning, severe pain, severe or uncontrolled bleeding, trouble breathing, eye injuries, and suspected broken bones or a limb that can’t move as “Examples of emergencies requiring immediate veterinary care” (Merck, What to Do in a Dog or Cat Emergency). The rest are covered one by one, with their sources, in the full list. → Emergency Signs in Dogs: When to Go Now, Not Tomorrow

Phone before you drive if you can. The same Merck page puts it simply: “Emergency care often starts with your phone call to the veterinarian.” The clinic can tell you what to do on the way and get ready for you.

Our note: Three items here rest on condition-specific sources: bloat, seizures over five minutes and sudden back-leg weakness. A male dog straining but unable to pass urine is also an emergency.

3. If your dog ate something

Call a vet, an emergency clinic or an animal poison helpline straight away, with the packaging in your hand. Tell them what it was, roughly how much, and when.

Don’t make your dog vomit unless a vet tells you to. Some substances do more damage coming back up, some dogs shouldn’t vomit at all, and the home methods people suggest online can cause their own harm. A vet can make a dog vomit safely when it is the right call. → My Dog Ate Something: Why You Shouldn’t Make Them Vomit Without a Vet

Human medicines are the most common thing people call about. ASPCA Poison Control reports that over-the-counter medicines and supplements made up “16.9% of the exposures our experts received calls about” in 2025, ahead of food and drink at 16.4% (ASPCA, Top 10 Toxins of 2025). These are US calls to one service.

→ Foods That Are Toxic to Dogs, With the Actual Evidence · → Ibuprofen, Paracetamol and Other Human Painkillers · → Xylitol: Where It Hides, and Why Minutes Matter · → Animal Poison Helplines by Country: Numbers, Fees, and What Works From Where

4. Vomiting, diarrhoea and not eating

Most dogs who vomit once, or have one bout of diarrhoea, and are otherwise bright, are not emergencies. We have not found a consensus list of warning signs for vomiting or diarrhoea, so the line between “watch” and “go” in this section is ours. If you’re unsure, phone your vet.

What the evidence does make clear is that a young puppy with vomiting and diarrhoea needs a vet the same day, especially an unvaccinated one. Parvovirus starts with signs that look like nothing much, and the Merck Veterinary Manual describes how quickly it moves: “Initial clinical signs may be nonspecific (eg, lethargy, anorexia, fever) with progression to vomiting and hemorrhagic small bowel diarrhea within 24–48 hours.” It adds that “Approximately 25% of dogs may have nonhemorrhagic diarrhea”, so the absence of blood is not reassurance (Merck, Canine Parvovirus Infection).

→ Vomiting and Diarrhoea: When It Can Wait and When It Can’t · → Does Diarrhoea Need Antibiotics? What the 2024 Guideline Says · → Blood in the Urine, Infections, and the Dog Who Strains but Can’t Pee

Our note: We couldn’t find a source we could cite for when vomiting or diarrhoea in an adult dog needs a same-day visit. If you’re unsure, phone your vet.

5. Itching, ears and limping

These are among the most common reasons dogs see a vet at all. They are rarely emergencies, and they are where the internet gives the most confident bad advice, from allergy tests that don’t work to ear cleaners that make things worse.

A limp becomes urgent if your dog can’t put any weight on the leg, the leg is at a strange angle, or there is a wound. See §2.

→ The Itchy Dog: Allergies, Atopic Dermatitis, and What Actually Helps · → Food Allergy or Environmental? Why Blood, Saliva and Hair Tests Don’t Tell You · → Ear Infections: Why They Keep Coming Back · → Cruciate Ligament Rupture: Surgery, Conservative Care, and the Evidence Gap

6. When behaviour changes

A dog who starts snapping, hiding, refusing stairs or flinching when touched is often blamed on age or temperament. Pain is one of the things a vet will want to rule out first. → When Behaviour Change Is Really Pain

Fear of fireworks and problems when left alone have moved to their own section. → Training & behaviour

7. How this section works

When in doubt, we send you to the vet. Every page in this section that discusses “when to see a vet” states the emergency signs plainly.

We never print a dose. No drug, no supplement, and no amount of anything to make a dog vomit. A dose printed on a web page gets applied to dogs nobody has examined.

We say where the evidence runs out. For several common symptoms, there is no consensus list of warning signs. Where that’s true, we say so, and we lean towards sending you to the vet.

Our note: “When in doubt, go” will sometimes send you to an emergency clinic for something that could have waited. We think that’s the right trade.

Our note: That a young puppy with vomiting and diarrhoea should be seen the same day is our reading of the Merck parvovirus chapter.

8. What we could not verify

Commonly saidWhat we found
“A seizure is only an emergency after three minutes”Not what the consensus says. The 2024 ACVIM consensus uses five minutes as the point at which a seizure is treated as status epilepticus. We found no source for three.
“A list of warning signs for vomiting in dogs”We found no consensus list. Clinic pages give lists, but none we could trace to a guideline.
“No blood in the diarrhoea means it isn’t parvo”Wrong. Merck: about 25% of dogs with parvovirus may have diarrhoea without blood.

Sources

Always confirm with your vet before acting on anything on this page.