Dog Has Diarrhea and Vomiting? Causes, Remedies & Emergency Vet Guide

Witnessing vomiting and diarrhea in dogs is one of the most common yet distressing experiences for any pet owner. When a dog has diarrhea and vomiting simultaneously, it usually indicates acute gastrointestinal (GI) inflammation. Whether your pet is experiencing mild stomach upset or a life-threatening crisis, early recognition and proper triage are vital to your dog’s recovery.

If you are currently saying, "my dog has diarrhea and vomiting" or "my dog is throwing up and having diarrhea," this comprehensive guide provides the clinical insights, emergency triage rules, and home care protocols you need to protect your pet.

Emergency Triage: When Is Vomiting and Diarrhea in Dogs an Emergency?

Not all stomach bugs require an immediate trip to the emergency animal hospital. However, because rapid dehydration, electrolyte imbalance, and internal bleeding can occur quickly, distinguishing between mild GI upset and a true emergency is critical.

Critical Warning: If you notice dry-heaving (straining to vomit with nothing coming up) accompanied by abdominal distension, this can indicate Gastric Dilatation-Volvulus (GDV/Bloat) or a foreign body obstruction. Seek emergency veterinary care immediately.

Why Dogs and Puppies Face High Risks from Combined Symptoms

When dogs that have diarrhea and vomiting lose fluids from both ends of the digestive tract, their body's hydration levels drop rapidly. This risk is exponentially higher in puppies and small breeds due to their lower body mass reserves and immature kidneys.

Unchecked fluid loss leads to hypovolaemia (low blood volume), severe electrolyte imbalances (sodium and potassium depletion), and reduced blood flow to vital organs. Without timely intervention, severe dehydration can cause hypovolemic shock, organ failure, and rapid health deterioration.

Most Common Causes: Why Is My Dog Throwing Up and Having Diarrhea?

When evaluating why my dog has diarrhea and throwing up, veterinarians categorize the root causes into several distinct areas:

1. Dietary Indiscretion ("Garbage Gut") & Abrupt Diet Changes

Dogs are opportunistic scavengers. Ingesting spoiled garbage, table scraps, high-fat foods, or dead animals frequently triggers acute gastroenteritis. Similarly, abruptly switching your dog's food without a 7-day transition period disrupts gut flora, causing dog puking and diarrhea.

2. Foreign Body Obstruction & Toxic Ingestion

Swallowing non-food items (toys, socks, bones, sticks, or corn cobs) can cause a physical blockage in the stomach or intestines. Additionally, ingestion of household toxins, lawn chemicals, antifreeze, human medications, or toxic plants (e.g., lilies, sago palms) can provoke rapid, severe gastrointestinal distress.

3. Infectious Pathogens (Viruses, Bacteria & Parasites)

• Viral Infections: Canine Parvovirus (Parvo) is a highly contagious, life-threatening virus causing bloody diarrhea and projectile vomiting, particularly in unvaccinated puppies. Canine Distemper and Coronavirus also cause GI distress.
• Parasitic Infections: Protozoans like Giardia and Coccidia, alongside intestinal worms (roundworms, hookworms, whipworms), irritate the intestinal lining.
• Bacterial Enteritis: Contaminated food or water containing Salmonella, E. coli, or Campylobacter leads to severe inflammation.

4. Chronic Illnesses, Pancreatitis & Systemic Disease

• Pancreatitis: Inflammation of the pancreas—often triggered by fatty meals—causes severe abdominal pain, persistent vomiting, and liquid stool.
• Organ Dysfunction: Kidney disease, liver failure, Addison's disease, and Inflammatory Bowel Disease (IBD) frequently manifest with recurring digestive upset.

What to Do: Step-by-Step Home Care Protocol (Mild Cases Only)

If your dog has diarrhea and vomiting but is acting bright, alert, and responsive, you can follow this vet-approved home management plan:

[Step 1: Short Fasting / Hydration Monitoring]
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[Step 2: Controlled Hydration & Electrolytes]
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[Step 3: Introduce a Bland Diet (Chicken & Rice)]
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[Step 4: Gut Health Support (Probiotics)]
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[Step 5: Gradual Transition Back to Regular Food]

1. Short Fasting Period (Adult Dogs Only)

   Withhold food for 6 to 12 hours to allow the inflamed stomach lining to rest.

   Note: Never fast young puppies or diabetic dogs without explicit veterinary direction.

2. Controlled Hydration Strategy

   Do not allow your dog to gulp large quantities of water, as a full stomach can trigger vomiting reflexes. Instead, offer small sips of fresh water or a veterinary-approved electrolyte solution (such as Oralade) every 30 to 60 minutes.

3. Introduce a Bland Diet

   Once vomiting has ceased for at least 6 hours, offer small portions of a 1:1 bland diet consisting of plain, boiled skinless chicken breast and plain white rice. Feed 3 to 4 small meals throughout the day.

4. Probiotic Support

   Incorporate a canine-specific probiotic (such as FortiFlora) to re-establish beneficial gut bacteria and shorten the duration of loose stool.

5. Gradual Food Reintroduction

   Over 5 to 7 days, slowly mix your dog's regular kibble back into the bland diet (25% normal / 75% bland, progressing to 100% normal) to avoid triggering a relapse.

What to Expect During an Emergency Vet Visit

When my dog has diarrhea and vomiting severely enough to require a clinic visit, the veterinary medical team will perform a structured diagnostic workup:

Diagnostic Workup

• Physical Examination & Triage: Evaluation of gum color, skin turgor (elasticity), heart rate, temperature, and abdominal palpation.
• In-House Fecal Diagnostics: Fecal flotation and direct smears to screen for intestinal parasites, worm eggs, and protozoa (Giardia).
• Rapid Viral Testing: Parvo SNAP tests for puppies and unvaccinated dogs.
• Blood Work & Imaging: Complete Blood Count (CBC) and chemistry panels to assess organ function, hydration, and infection. X-rays (radiographs) or abdominal ultrasound check for foreign body obstructions or bloat.

Clinical Treatments

• Fluid Therapy: Subcutaneous (SQ) or Intravenous (IV) fluids to rapidly restore hydration, blood volume, and electrolyte balance.
• Injectable Anti-Emetics: Medications such as maropitant citrate (Cerenia) to immediately block nausea and stop vomiting.
• Gastroprotectants & Targeted Medications: Medications to coat the stomach, specific antibiotics for bacterial enteritis, or dewormers for parasitic infections.

Frequently Asked Questions (FAQs)

Q: What should I do if my dog is vomiting and has diarrhea but is acting normal?

A: If your dog is vomiting and has diarrhea but acting normal (playing, drinking, energetic), monitor them closely at home. Initiate controlled hydration and a bland diet. If symptoms persist beyond 24 hours or if lethargy develops, consult your veterinarian.

Q: My dog has diarrhea and is throwing up—can I give them human Pepto-Bismol or Imodium?

A: No. Never administer human medications without direct veterinary approval. Pepto-Bismol contains salicylates (aspirin-like compounds) which can cause stomach ulcers or toxicity, and Imodium (loperamide) can be dangerous or fatal to certain breeds (such as Collies carrying the MDR1 gene mutation).

Q: How long can a puppy or adult dog go with diarrhea and vomiting before seeing a vet?

A: Adult dogs with mild symptoms should be evaluated if condition persists past 24 hours. For a puppy with vomiting and diarrhoea, seek veterinary attention if symptoms last more than 12 hours or if they exhibit lethargy or refusal to drink.

Q: What color should I watch out for in my dog's stool or vomit?

A: Watch for bright red blood (hematochezia) or dark, tarry black stool (melena, indicating upper GI bleeding). Bright green or yellow bile indicates an empty stomach, while dark coffee-ground material in vomit signifies digested blood and demands immediate emergency care.

Conclusion & Final Veterinary Advice

Experiencing dog diarrhea and vomiting can be alarming, but knowing how to evaluate red flags allows you to take fast, decisive action. While mild cases of my dog has diarrhea and throwing up often resolve with rest, controlled hydration, and a bland diet, never hesitate to seek professional care if red flags appear.

When in doubt, contacting your local veterinarian or emergency animal hospital ensures your beloved companion receives the care they need to return to health.