Diarrhea in Puppies

Boxer Puppy in Rear Seat of Car

Cavan Images / Getty Images

Diarrhea can often be a sign of illness, caused by many different conditions. It's a common issue in puppies, but it can also potentially become serious if they get dehydrated or consumed anything inedible or dangerous. Although mild cases can be treated at home, more severe cases of diarrhea can be deadly for puppies and will need veterinary help. It's important for puppy owners to recognize serious symptoms and be familiar with dog diarrhea treatments, so they know how to proceed when their puppy is having diarrhea.


Don’t wait to treat diarrhea—the resulting dehydration can make puppies even sicker. There are certain signs of diarrhea that require calling a veterinarian immediately, like waste looking black with a tar-like consistency, smelling extremely foul, containing large amounts of red blood, or being accompanied by symptoms like vomiting, severe abdominal pain, fever, appetite loss, or lethargy.

Why Do Puppies Get Diarrhea?

Diarrhea can be associated with viruses like parvovirus and distemper. It can also be caused by intestinal parasites like whipworms and hookworms, protozoa like giardia, and bacteria like salmonella and E. coli. Some types of intestinal parasites can require several tests (over weeks) to obtain a diagnosis. Puppies can also develop diarrhea from a sudden new environmental change, like abrupt changes in diet, the stress of coming to a new home, being overfed, or from indiscriminate eating (like out of the garbage or picking up items from outside).

Viruses and Infections

Puppies' immune systems are not fully developed when they are very young and haven't completed their full set of vaccines. This means they are generally more susceptible than adult dogs to bacterial or viral infections.


Both types of infection should be addressed immediately because they have the potential to be fatal. Common bacterial infections include salmonella and E. coli, but there are many other bacteria that can infect your pet.

Viral infections such as parvovirus and distemper, as well as coronavirus, can infect an unvaccinated puppy and cause diarrhea, and all are dangerous. If your puppy is suffering from an infection there's a good chance you'll see additional symptoms such as fever, lethargy, and/or lack of appetite.


Puppies can acquire some intestinal parasites such as roundworms and giardia from their mothers very soon after birth. They can also pick them up from the ground or infected water while outside. Most common intestinal parasites can be treated with the right medications from your vet, but some, if not treated, can be dangerous to your pet's long-term health.


Puppies' digestive systems are still developing, and some puppies may have sensitive stomachs or have a hard time with particular brands or types of foods. Most will also respond poorly to a quick change in diet. A few have food allergies that can lead to diarrhea. Check with your vet to be sure the food you've selected is a good match for your puppy's needs; there are many different types of food available, and one will certainly be right for your pet.

In addition to having sensitive digestive systems, puppies are also curious and may mouth or ingest almost anything they find interesting. This can include string, garbage, or virtually anything they find on the ground. In some cases, this can be dangerous; certain objects can cause intestinal blockages while others can be toxic.


If your puppy has just been separated from its mother and siblings, chances are it's feeling some level of stress. Stress can be exacerbated by factors such as other pets in the house, unexpected sounds or smells, new foods, and new schedules. You can help your puppy overcome stress by providing a calm, predictable schedule, regular feedings and exercise, and plenty of affection.


It’s always best to get a vet check first, but he or she may recommend that milder forms of diarrhea be treated at home. For instance, if it’s been less than three days, your puppy still feels and acts well, and the diarrhea has a pudding-like appearance, home care is usually appropriate.

Until you see the vet, however, withhold food (but never water) for 12 to 24 hours. This allows the gut to rest and gives the irritation a chance to heal. However, don’t withhold food any longer than 24 hours without direction from your veterinarian.

How to Treat a Puppy with Diarrhea

The Spruce / Vin Ganapathy

Make sure that water is always available for your puppy, as it’s very easy to quickly become dehydrated. Plus, sudden watery diarrhea can spill large amounts of fluid and important electrolytes out of the body. If your pet is reluctant to drink, offer ice cubes to lick. Pedialyte or Gatorade half diluted with water can counter the dehydration as well.

Pepto-Bismol and Kaopectate may also help your pup. Use a needleless syringe or a turkey baster to squirt the medicine into his or her mouth. If appropriate for your pup's situation, your vet will know the proper dosage.

It usually takes a couple of days for your puppy’s upset tummy to calm down, so a bland diet is suggested. Offer cooked plain white rice or plain, soft, cooked macaroni in a no-salt chicken broth. For more flavor, you can stir in a tablespoon of low-fat cottage cheese or plain yogurt. Yogurt contains beneficial bacteria that can help rebalance the disruption caused by diarrhea in your puppy. You can also try adding a little pumpkin flavor, as its high fiber content can assist with constipation or diarrhea, allowing the stool to normalize.


The best thing you can do for your puppy is to make sure there is plenty of healthy and balanced food and exercise provided daily. New diets should be transitioned into slowly when puppies are young. It's possible that your puppy is getting into some spoiled food through the garbage can, so keeping those out of reach and being strict about not feeding your puppy any human food scraps is key. You will also want to stay current on your pup's vaccinations, and check for any lingering parasites.

When it comes to your puppy's environment, make sure that it's stress-free. If your puppy is in a kennel with other pets, you'll want to ensure that it's clean and disinfected. Puppies are sensitive to their surroundings, so it's helpful to stay on a regular routine for sleep, food, exercise, and walks. Another thing that can help is providing some weekly obedience training. On walks, you'll want to keep an eye out for any plant or puddle consumption, as feces can be present which can lead to diarrhea. When you're unable to supervise your puppy, you may want to keep it kenneled to prevent any accidents.

If you suspect your pet is sick, call your vet immediately. For health-related questions, always consult your veterinarian, as they have examined your pet, know the pet's health history, and can make the best recommendations for your pet.

Watch Now: All You Need to Know about Puppies

Article Sources
The Spruce Pets uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Why Is My Puppy Suffering From Diarrhea?. Hudson Veterinary Hospital, 2020

  2. Centers for Disease Control and Prevention. "What You Should Know About COVID-19 and Pets." Published June 29, 2021.