It’s not uncommon for dogs to have an occasional upset stomach. But when vomiting or diarrhea strikes, it can be hard to know whether it’s something minor—or something serious.
Gastrointestinal (GI) symptoms are among the most common reasons dogs visit the vet. Sometimes, these issues resolve quickly on their own. Other times, they can be signs of something far more dangerous—infections, toxins, or even organ problems.
At 1st Pet Veterinary Centers, we’re here to help you understand the symptoms of a sick dog, spot the red flags, and make the safest decision for your pet’s health—especially in Arizona, where dehydration can escalate fast.
Common Causes of Vomiting and Diarrhea in Dogs
GI upset in dogs has many possible causes. While some are mild, others require urgent care. Below are some of the most common triggers:
- Dietary indiscretion: Dogs are curious. Eating garbage, spoiled food, table scraps, or unfamiliar treats can lead to vomiting or diarrhea.
- Parasites or infections: Viruses, bacteria, or intestinal parasites (like giardia or hookworms) are common culprits—especially in puppies or dogs who frequent dog parks or daycare.
- Food allergies or intolerances: Some dogs develop sensitivities to ingredients like chicken, beef, wheat, or dairy.
- Toxins and foreign bodies: Ingesting poisonous substances (e.g., chocolate, certain plants, human medications) or swallowing objects like socks, bones, or toys can cause severe GI distress.
- Reactions to medication or vaccines: While rare, some dogs may react with mild stomach upset. If you’re concerned, ask your vet about options.
When It’s Probably Not an Emergency
In many cases, vomiting or diarrhea is short-lived and manageable at home, especially if your dog is otherwise behaving normally. You may not need to rush to the vet if:
- Your dog vomits once or has a single loose stool, then returns to normal
- There’s no blood in the vomit or stool
- Your dog is alert, active, and drinking water
- Symptoms resolve within 24 hours
If you’re seeing mild symptoms but still feel unsure, it’s okay to monitor for a day—just keep a close eye on your dog’s behavior and hydration.
Red Flags: When Vomiting or Diarrhea Is Serious
There are times when vomiting and diarrhea cross the line from mild to life-threatening. These symptoms should never be ignored:
- Repeated vomiting or diarrhea that lasts more than 24 hours
- Blood in vomit or stool (bright red or dark and tarry)
- Lethargy, weakness, or sudden collapse
- Dry gums, sunken eyes, or signs of dehydration
- Painful, bloated abdomen
- Inability to keep water down
These may signal dangerous infections, internal injuries, foreign bodies, pancreatitis, or even organ failure. Puppies, senior dogs, and toy breeds are especially at risk because they dehydrate faster.
When in doubt, don’t wait. Call your veterinarian.
What to Do at Home (and What Not To)
If your dog has a mild case and is otherwise acting normal, there are a few steps you can take to support recovery at home:
Safe at-home care:
- Withhold food for 12 hours to give the stomach time to settle (for adult dogs only).
- After fasting, offer a bland diet—plain boiled chicken (no seasoning) and white rice in small portions.
- Make sure fresh water is available at all times.
- Offer small amounts of ice cubes or ice chips if your dog won’t drink.
What NOT to do:
- Don’t give your dog human medications like Pepto-Bismol, Imodium, or Tylenol—these can be dangerous.
- Don’t ignore signs of distress or ongoing symptoms.
- Don’t wait longer than 24 hours if your dog isn’t improving—or if symptoms get worse.
Remember: even mild dehydration can progress quickly, especially in Arizona’s dry climate.
Conclusion: Trust Your Gut—And Call If You’re Unsure
Vomiting and diarrhea can be scary—but they don’t always mean disaster. Still, it’s critical to stay alert, know the symptoms of a sick dog, and act quickly when something seems wrong.
- Mild digestive upset? Monitor at home and try a bland diet.
- Concerning symptoms or no improvement after 24 hours? Call your vet.
- If your dog seems “off,” seems in pain, or has underlying conditions—don’t wait.
At 1st Pet Veterinary Centers, we’re here to help you make the safest choice for your dog. Whether it’s a late-night emergency or a quick phone consultation, our team is here when you need us.
Not sure if it’s serious?
Contact 1st Pet today to speak with a veterinary professional or schedule an exam. We’re here to help—day or night.
