Loose motions are one of the most common reasons Indian pet owners call a vet, and the monsoon makes them more frequent as bacteria thrive and dogs pick up more from puddles and street food. Most short bouts settle on their own, but the colour and other signs tell you a lot about how worried to be.
This guide is a plain colour chart for dog diarrhoea, followed by the common causes, how long is safe to wait, and the red flags that mean a vet the same day.
Dog diarrhoea colour guide
Colour is a genuinely useful clue, though it is never the whole story. Use it alongside how your dog is behaving, not on its own.
Brown but loose or watery Monitor
The most common kind. Normal brown colour but soft, pudding-like, or watery. Usually a mild upset from a diet change, scavenging, stress, or a mild bug. In an otherwise bright dog it often settles in a day.
What to do: a bland diet (plain boiled rice with a little boiled chicken) and plenty of water for a day. See a vet if it lasts beyond 24 to 48 hours or the dog seems unwell.
Yellow or orange Monitor
Often means food is moving through too fast to take on its normal colour, or points to the liver or gallbladder. It can also follow a bland chicken-and-rice diet. Occasional yellow is usually minor; persistent yellow is worth a check.
What to do: watch for a day. If yellow diarrhoea keeps returning, or comes with vomiting or low energy, see a vet.
Green Monitor
Usually from eating a lot of grass (dogs often do this when their stomach is unsettled) or a gut infection speeding things up. The grass itself is harmless, but the reason your dog is eating it may not be.
What to do: note whether your dog has been grazing on grass. If green diarrhoea persists or the dog is off-colour, see a vet.
Not sure how serious the colour is?
PawCheck's Gut Check reads a photo of your dog's stool plus a few quick questions and gives you a severity result, Normal, Monitor, or Urgent, in seconds.
Get it on Google Play ↗Black or tarry Urgent
Black, sticky, tar-like stool can mean digested blood from higher up the gut (stomach or small intestine). This is one of the two urgent colours. It is easy to miss on dark ground, so look closely.
What to do: see a vet the same day. Black tarry stool is a sign of possible internal bleeding and should never be watched at home.
Red streaks or fresh blood Urgent
Fresh red blood or jelly-like mucus points to the lower gut (colon). A little streak with a one-off soft stool can be minor irritation, but repeated blood, watery bloody diarrhoea, or blood with a very low mood is urgent, and in puppies it is a warning sign for parvo.
What to do: see a vet the same day for anything more than a single small streak, and immediately for any young or unvaccinated puppy.
Grey, greasy, or very pale Monitor
Pale, greasy stool that looks like it has too much fat can point to trouble digesting food, such as a pancreas issue. It often comes with weight loss or a ravenous appetite despite eating well.
What to do: see a vet for a check-up if stool is repeatedly pale and greasy, especially with weight loss.
Common causes behind the colour
Whatever the shade, the reason underneath is usually one of these:
- Diet: a sudden food change, scavenging, spoiled or oily food, or festival leftovers
- Infections: bacterial or viral, more common in the monsoon, with parvo the serious one in puppies
- Parasites: worms and protozoa such as Giardia, very common in Indian dogs
- Stress: travel, boarding, fireworks, or a change at home
- Longer-term issues: food sensitivities or gut disease that cause diarrhoea that keeps coming back
Diarrhoea often travels with other gut signs. If your dog is also being sick, our guide on when dog vomiting is an emergency helps, and if the appetite has dropped too, see why a dog stops eating.
When diarrhoea means a vet, quick guide
- Same day (urgent): black tarry stool or fresh blood, watery diarrhoea with vomiting, signs of dehydration (dry gums, skin that stays tented), a weak or collapsed dog, or any diarrhoea in a young unvaccinated puppy
- Within a day or two: diarrhoea lasting more than 24 to 48 hours, keeps returning, or comes with low energy or being off food
- Watch at home: a single day of mild loose stool in a bright, active dog that is eating and drinking, with a bland diet
Black tarry stool and fresh red blood both point to bleeding in the gut and need a vet the same day. Watery bloody diarrhoea in a puppy can be parvo, which spreads fast and can be fatal. Never give human anti-diarrhoea medicines to a dog without a vet's advice, some are harmful to dogs.