My dog has diarrhea — when should I be worried?

Diarrhoea is one of the most common digestive complaints in dogs. A single loose stool is usually not alarming, but knowing when to manage it at home and when to seek veterinary help can make a significant difference for your dog's wellbeing.

Common causes of acute diarrhoea

- Dietary change or indiscretion – Switching food too quickly or eating something unusual is the most frequent cause.
- Stress – Travel, boarding, loud noises, or changes in routine can cause stress colitis.
- Viral or bacterial infection – Parvovirus (particularly in unvaccinated puppies), Salmonella, Campylobacter.
- Parasites – Roundworms, hookworms, Giardia, and Cryptosporidium are common culprits, especially in dogs with outdoor access.
- Medications – Antibiotics and anti-inflammatories frequently cause temporary loose stools.

Home management for mild, uncomplicated diarrhoea

1. Ensure constant access to fresh water to prevent dehydration.
2. Feed small, frequent portions of bland food (boiled chicken + plain white rice or a vet-recommended intestinal diet) for 48–72 hours.
3. Do not give human anti-diarrhoea medications without veterinary advice — some are toxic to dogs.
4. Gradually reintroduce normal food once stools firm up.

Signs the diarrhoea is becoming chronic

Diarrhoea lasting more than 2–3 weeks, or recurring regularly, may indicate inflammatory bowel disease, food intolerance, exocrine pancreatic insufficiency, or other chronic conditions requiring diagnosis.