By Dial A Vet Veterinary Team
When a dog has diarrhoea, most owners want to do something helpful straight away. The safest help is often simpler than the internet suggests: water, rest, and a call to your vet if things are not settling. Some popular home remedies, and almost all human anti-diarrhoeal medicines, can make things worse or hide the signs of a serious illness. This page covers what is generally considered safe to offer, what to avoid, and when home care is not enough. For a step-by-step plan, see my dog has diarrhoea: the first 24 to 48 hours.
Key takeaways
- The most important thing to give a dog with diarrhoea is constant access to fresh, clean water.
- Ask your vet before changing food. Many vets suggest small meals of a gentle, easily digested diet for a short time.
- Only use probiotics, fibre supplements, or rehydration products that your vet recommends for dogs.
- Do not give human anti-diarrhoeal medicines, bismuth products, leftover antibiotics, or other people's prescriptions.
- Puppies, dogs with blood in the stool, vomiting, or lethargy need a vet rather than home care.
What you can safely give
Water, always. Diarrhoea causes fluid loss. Keep a full bowl of fresh water in easy reach and refresh it often. Some dogs drink better from a wide bowl or a pet fountain. If your dog will not drink, drinks and then vomits, or seems dull, contact a vet.
A gentle diet, with your vet's guidance. Vets commonly suggest a short period of small, frequent meals of a bland, low-fat food, such as a veterinary gastrointestinal diet or a plain home-cooked meal your vet describes, followed by a gradual return to normal food over a few days. Long fasts are no longer routine, and puppies, toy breeds, and diabetic dogs should not be fasted without veterinary advice. Avoid fatty meat, skin, gravy, seasoning, onion, and garlic.
Vet-recommended supplements. Some veterinary probiotics and fibre products have reasonable evidence for shortening mild diarrhoea. Quality varies widely, so ask your vet which product to use rather than buying a human supplement.
Rest and a quiet routine. Short toilet walks, a comfortable bed, and fewer treats give the gut time to settle.
What not to give
- Human anti-diarrhoeal medicines. These can be dangerous for some dogs, including herding breeds with a gene that makes them sensitive to certain drugs. They can also trap toxins or infection in the gut and mask signs a vet needs to see.
- Bismuth products (pink stomach medicines). These contain a salicylate related to aspirin, which can irritate the stomach, and they turn stools black, which can hide bleeding.
- Leftover antibiotics. Most cases of acute diarrhoea do not need antibiotics, and the wrong one can make diarrhoea worse or contribute to resistance. See dog antibiotics and prescriptions.
- Human painkillers. Ibuprofen and similar drugs can cause stomach ulcers and kidney damage in dogs. See pain medication for dogs.
- Milk and dairy. Many dogs do not digest lactose well, and dairy can worsen diarrhoea.
- Sports drinks or homemade salt solutions. These are not balanced for dogs. If your vet thinks oral rehydration is useful, they can recommend a product.
- Essential oils, charcoal, or herbal remedies unless your vet advises them.
When home care is not enough
Go to an emergency veterinary hospital straight away if your dog:
- Has large amounts of blood in the stool, or black, tarry stools
- Is vomiting as well, or cannot keep water down
- Is weak, flat, or collapsing, or has pale or dry gums
- Is a puppy, particularly if not fully vaccinated (parvovirus is a risk)
- Has a painful or swollen belly
- May have eaten a toxin, medication, or an object
Book a vet appointment if diarrhoea lasts longer than 24 to 48 hours, keeps returning, or your dog is losing weight.
How vets help
A vet can examine your dog, check hydration, and test a stool sample for worms and Giardia. Depending on what they find, they may suggest blood tests, a parvovirus test, or imaging. Treatment might include fluids, anti-nausea medication, deworming, a veterinary gastrointestinal diet, a probiotic, or other medication suited to the cause. Recurring diarrhoea may need food trials or further investigation. See diarrhoea in dogs: types and causes for more detail.
Preventing the next episode
- Change foods slowly over about a week.
- Keep bins secured and limit table scraps and rich treats.
- Stay up to date with worming and vaccinations.
- Keep a note of foods or treats that seem to trigger problems.
FAQ
Is pumpkin good for dog diarrhoea?
Plain cooked pumpkin is a source of fibre and some vets suggest it for mild cases. It is not a cure, and if diarrhoea persists your dog still needs to be seen. Ask your vet whether it suits your dog.
Can I give my dog yoghurt for diarrhoea?
Yoghurt contains lactose and is not a reliable probiotic for dogs. A veterinary probiotic is a better choice if your vet recommends one.
How quickly should things improve?
Mild cases usually improve within one to three days. If they do not, or your dog seems unwell at any point, see a vet.
Talk with a vet
If you are not sure what to offer your dog or whether they need to be seen, our vets can help by video. Book a consult at dialavet.com. If your dog has bloody diarrhoea, is vomiting, is a young puppy, or seems weak, go to an emergency vet hospital now.
References
- Merck Veterinary Manual. Diarrhea in Dogs and Cats.
- Jessen LR, et al. ENOVAT guidelines for antimicrobial use in canine acute diarrhoea. The Veterinary Journal, 2024.
- ASPCA Animal Poison Control Center. Human medications and pets.
Disclaimer: Educational only. This page does not replace an examination or advice from your own veterinarian, and it is not a guide to medicating your dog. If your pet has bloody diarrhoea, is vomiting, or seems unwell, contact a veterinary hospital promptly.
