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Symptom Guide

Why is my dog throwing up?

If you're searching this at 11pm because your dog just threw up on the rug, take a breath. In dogs, vomiting is more common — and usually less serious — than it is in humans. But it can also be the first sign of something that needs a vet today, not tomorrow. Below is the realistic spread of causes, in roughly the order they show up in real Seattle households, including the one most owners overlook: what they picked up off the ground in their own backyard.

Need help right now?

We'll direct you to the closest 24/7 vet.

Two fields. Once your dog is okay, we'll follow up with a short call to help you check the yard for what caused it — because most repeat episodes start there.

Used only to text the closest vet and one follow-up call about your yard. No marketing, no sharing.

Educational, not medical advice. Humane Paws is a Seattle yard sanitation company, not a veterinary clinic. If your dog is showing severe or persistent symptoms — repeated vomiting, bloody diarrhea, refusing food for over 24 hours, lethargy, or signs of dehydration — call your veterinarian or a 24/7 emergency animal hospital immediately.

What it usually means

Mild, one-off vomiting is usually fine. Repeat vomiting isn't.

A single episode of vomiting in an otherwise normal dog — eating, drinking, alert, no diarrhea — is rarely an emergency. Repeat vomiting, or vomiting paired with other symptoms, is a different category and warrants a call.

Probably okay if

  • One episode, dog otherwise acting normally
  • Recently ate something rich or unusual (table scraps, new treat)
  • Brought up grass or foam, then settled
  • No diarrhea, no lethargy, drinking water normally

Call the vet if

  • Vomiting more than twice in 24 hours, or repeatedly for over 12 hours
  • Vomit contains blood, looks like coffee grounds, or is bright yellow/green and persistent
  • Paired with diarrhea, lethargy, refusing water, or a swollen belly
  • Puppy under 6 months, senior dog, or any dog with an existing condition
  • Suspected ingestion of toxin, foreign object, or anything from a trash can or yard

Most common causes

The realistic spread, ranked roughly by frequency.

Causes flagged with a leaf trace back to yard or fecal exposure — the source most owners overlook.

  1. 01

    Dietary indiscretion (something they shouldn't have eaten)

    The most common single cause. Table scraps, garbage, sticks, mulch, grass, sidewalk debris — dogs investigate the world with their mouths, and any new or unusual material can trigger vomiting within hours.

  2. 02

    Eating too fast

    Fast eaters swallow air with their food. The result is a stomach that empties everything back up about ten minutes after the bowl. Slow-feeder bowls usually fix this.

  3. 03

    Intestinal parasites

    Yard-linked

    Roundworm, hookworm, whipworm, and Giardia are all routes to vomiting — usually paired with diarrhea, weight loss, or a dull coat. Almost all parasitic infections trace back to ingesting eggs or cysts from contaminated soil or feces.

  4. 04

    Bacterial infection (often from feces or contaminated soil)

    Yard-linked

    Salmonella, Campylobacter, and E. coli all cause acute vomiting and diarrhea in dogs. These bacteria are shed in infected feces and can persist in soil and on grass for days to weeks.

  5. 05

    Viral infection (parvo is the one to rule out)

    Yard-linked

    Canine parvovirus is the disease vets most fear in this category. It's transmitted through infected feces and contaminated environments — including yards where an infected dog has been. Vomiting + bloody diarrhea + lethargy in a young or unvaccinated dog is a parvo workup until proven otherwise.

  6. 06

    Toxin or foreign-body ingestion

    Antifreeze, rodenticides, certain plants, chocolate, xylitol, sticks, socks, corn cobs. If you suspect ingestion, don't wait for symptoms to escalate — call the vet or poison control immediately.

  7. 07

    Pancreatitis, kidney disease, liver disease, or cancer

    Less common but worth naming. Persistent or recurring vomiting in older dogs is one of the early signs of underlying disease and is what regular vet checkups exist to catch.

The cause most owners overlook

The cause most owners never think to check: the yard itself.

If your dog spends time in a backyard — yours or anyone else's — that yard is one of the highest-probability places they're picking something up. Dog-to-dog transmission of parasites and bacteria happens almost entirely through the fecal-oral route, and the soil in a typical untreated yard is a long-lived reservoir for both.

The science behind yard contamination →

Giardia

Cysts can survive in moist Seattle soil for weeks. A dog who licks paws after walking through contaminated grass has just ingested them.

Roundworm (Toxocara canis)

Eggs in soil become infectious after a few weeks and remain so for years. Re-infection is the rule, not the exception, in untreated yards.

Salmonella & Campylobacter

Shed in feces, picked up off grass and soil. Often the unidentified culprit behind 'random' bouts of vomiting and diarrhea.

Parvovirus

Survives in soil and on surfaces for months to over a year. Yards where an infected dog has visited remain dangerous for unvaccinated dogs long after the visible signs are gone.

Right now — the next hour

What to do in the next 60 minutes.

  1. 1

    Withhold food for 6–12 hours (water is fine — encourage small frequent sips).

  2. 2

    If they keep water down, reintroduce a small bland meal: boiled chicken + plain white rice, or a vet-recommended bland diet.

  3. 3

    Note the time, frequency, and contents of each episode. Photos help your vet.

  4. 4

    Walk the yard and trash for anything they could have eaten — capture or photograph evidence.

  5. 5

    If symptoms escalate or you see any red-flag sign above, call your vet or an emergency clinic.

Stopping the next episode

Stopping the next episode usually starts in the yard.

When vomiting becomes a recurring pattern — not a single episode — the most common driver in our experience is environmental: a yard that's quietly reinfecting the dog week after week. Removal alone is not enough; the eggs, cysts, and bacteria left behind in the soil are the actual problem.

  • Remove waste from the yard at least weekly — daily is better.
  • Sanitize, don't just remove. Pet-safe treatments break down the pathogens that survive after pickup.
  • Keep your dog out of yards you don't know the history of, especially if they're young or unvaccinated.
  • Don't let your dog drink standing water in the yard — Giardia cysts thrive there.
  • Stay on monthly parasite prevention from your vet — yard sanitation reduces load, but isn't a substitute for prevention.
Why It Matters

Why Humane Paws

The part of yard care that addresses what's actually in the soil.

  • Weekly comprehensive removal
  • Pet-safe sanitization
  • Watershed-conscious disposal protocol
  • Free assessment, annual care plan

Frequently asked

What people search next.

My dog threw up once and seems totally fine. Should I worry?

Probably not. A single episode of vomiting in a dog who is otherwise eating, drinking, alert, and acting normally is rarely an emergency. Withhold food for a few hours, reintroduce a small bland meal, and watch for any escalation. If they vomit again, can't keep water down, become lethargic, or develop diarrhea, call your vet.

Can my dog get sick from being in our own backyard?

Yes — and it's far more common than most owners realize. Untreated yards harbor parasite eggs, Giardia cysts, and bacteria that survive in soil and on grass for weeks to years. Reinfection from your own yard is one of the most overlooked causes of recurring vomiting and diarrhea in dogs.

What's the difference between vomiting and regurgitation?

Vomiting is an active heave with abdominal contractions and partially digested contents. Regurgitation is passive — food comes back up undigested, usually shortly after eating, with no warning. Both can indicate problems, but they point at different ones, so describe what you saw to your vet accurately.

How do I know if it's parvo?

Parvovirus typically presents as severe vomiting, profuse and often bloody diarrhea, profound lethargy, and refusal to eat — most often in puppies or unvaccinated young dogs. Parvo is a medical emergency. If your dog has any combination of these symptoms and isn't fully vaccinated, go to the vet immediately, do not wait.

Once your dog is okay

Make the yard the part of the problem you actually solve.

Free, on-site walkthrough. We'll listen to what's been happening, look at the yard with fresh eyes, and send a written quote.

Need a vet right now?

Seattle Emergency Veterinary Directory.

A curated list of 24/7 emergency animal hospitals serving the greater Seattle area. Tap any entry to open it in Google Maps for current phone, address, and directions.

Find Emergency Vets Near Me

Suspected toxin or poisoning?

Two 24/7 national poison hotlines.

If your dog may have ingested a toxin, plant, medication, or unknown substance — call one of these hotlines while you arrange a vet visit. They can advise on first response and consult with your vet directly.

Directory curated by Humane Paws · Last verified May 2026

Always call your regular veterinarian first if they're available.