Sometimes it takes just one muddy puddle, a quick visit to the garden buffet, or a mystery “snack” on a walk for a dog’s stomach to revolt. If your dog has diarrhoea (also spelled diarrhea), you are not alone. The good news is that many mild cases settle quickly with sensible support at home.
This guide is your calm, practical “what do I do now?” plan. It covers what helps most dogs, what to avoid, how to support hydration, and when it is time to speak to your vet.
Quick answer: If your dog has diarrhoea but is otherwise bright, drinking, and behaving fairly normally, start by supporting hydration, pausing treats and chews, feeding smaller meals of their usual food more often, and preventing further scavenging. If your dog seems unwell, has blood in the stool, is vomiting repeatedly, refuses water, or symptoms last more than 24 hours, contact your vet.
Important note: I am not a vet. If you are worried, your dog seems unwell, or symptoms are severe or persistent, your vet is the best next step.
When to Call the Vet (Quick Summary)
If any of the below apply, I would not wait it out. Contact your vet for advice.
- Blood in the stool (fresh red or dark, tarry poo)
- Very watery diarrhoea, repeated large-volume episodes, or you cannot keep up with the clean-ups
- Vomiting alongside diarrhoea (especially repeated vomiting)
- Your dog seems unwell (lethargic, weak, painful tummy, trembling, distressed)
- Refusing water or signs of dehydration (dry gums, sunken eyes, collapse)
- Puppies, very small dogs, seniors, or dogs with known health conditions
- Diarrhoea lasting more than 24 hours or getting worse
For a vet-written checklist, the PDSA guide is useful: PDSA advice on diarrhoea in dogs.
Quick Action Checklist (Do This First)
- Check your dog’s mood: bright and normal, or quiet and off?
- Hydration first: fresh water always available.
- Pause treats and chews for now.
- Feed smaller meals more often using their normal food.
- Prevent scavenging in the garden and on walks.
- Monitor changes over the next 24 hours.
Common Causes of Dog Diarrhoea
If you are trying to figure out the “why”, these are the most common causes owners run into:
- Scavenging (food on the floor, bins, compost, animal poo, dead stuff)
- Puddle drinking and contaminated water
- Sudden food changes (new brand, new protein, rich toppers)
- Too many extras (rich treats, chews, fatty snacks)
- Stress (travel, fireworks, guests, a big routine change)
- Parasites (more likely if your dog eats poo or scavenges)
- Infections (viral or bacterial stomach upsets)
- Medication side effects (often after antibiotics)
- Food sensitivity or intolerance
If you suspect your dog has eaten something unsafe such as human food, medication, cleaning products, or a household item, do not rely on home care. Use this as your next read: Foods & Items Poisonous to Dogs.
What To Do Right Now: The Simple Home Plan
These steps help most dogs with mild diarrhoea when they are otherwise bright, drinking, and behaving normally.
1) Hydration First (This Matters More Than Food)
The biggest risk with diarrhoea is dehydration, especially in smaller dogs and puppies. Make sure your dog has constant access to fresh water. If they are reluctant to drink, support hydration early.
Oralade
Oralade helps rehydrate your dog and replace lost fluids. Think of it as an electrolyte drink for dogs.
Offer small amounts regularly and keep fresh water available. Any leftover can be frozen and saved for the next inevitable episode.
If your dog is prone to mild tummy upsets, poor drinking, travel stress, or post-antibiotic wobbliness, hydration support and gut support often work well together. I cover that in more detail here: Dog Supplements Explained: What Really Works.
2) Keep Food Simple (But Avoid Extra Sudden Changes)
I usually avoid the standard advice of feeding boiled chicken and rice. That is another sudden diet change, which can sometimes make things worse, and some dogs do not tolerate chicken brilliantly either.
Instead, I usually do this:
- Stick with their normal food, but temporarily reduce portion sizes.
- Increase meal frequency so the gut is not overloaded.
- Pause all chews and treats for now. It is not forever.
If your dog normally has two meals a day, split this into around five to six small meals. Smaller portions are easier on the gut and help keep things ticking over without overwhelming a sensitive stomach.
Structured feeding matters here. Leaving food down all day can make it harder to monitor appetite, portions, and early changes in how your dog is feeling. If you want a deeper breakdown on feeding routines and why grazing can make health changes easier to miss, read: Avoid Leaving Dog Food Down.
And if you use meals as enrichment, that can be really useful in the bigger picture too. Dogs are natural scavengers, so giving them appropriate outlets to sniff, lick, forage, and work for food can reduce the urge to find their own entertainment elsewhere. This guide fits nicely alongside that: Ultimate Guide to Slow Feeders & Dog Enrichment Toys.
If you are also questioning whether the underlying diet itself is suiting your dog, especially if loose motions keep happening, this is worth reading too: Best Dog Food for Healthy Dogs.
3) Support the Gut (Probiotics, Binders, and Fibre)
Once hydration is covered and you have simplified meals, gut support can help firm things up and settle irritation. Here are the options I use most often, depending on what the poo looks like.
Pro-Kolin (my “first-aid” option for sudden diarrhoea)
A true cupboard essential in our house. Pro-Kolin acts like a kind of tummy glue and can help firm things up quickly, especially after scavenging, puddle-drinking, or a sudden “I ate something weird” moment.
Synbiotic Capsule (for stressy tums, travel, new routines)
If your dog tends to get loose motions during change such as a new routine, visitors, travel, boarding, fireworks season, or after antibiotics, a daily synbiotic can be a useful support. Synbiotics combine probiotics plus the “food” those friendly bacteria need.
Here is the one I use: Synbiotic Capsule.
Protexin Pro-Fibre (when stools are soft or cow-pat style)
If your dog’s poo is not explosive, just consistently soft and hard to pick up, fibre support can make a big difference to stool quality. Protexin Pro-Fibre is a useful option for dogs who need more stool structure.
Find it here: Protexin Pro-Fibre.
Fettle Pumpkin Powder (gentle stool tuning)
Sometimes you just need a gentle, single-ingredient helper. Pumpkin fibre can help firm loose stools, and for some dogs it also helps keep things more consistent over time.
Here’s the one I recommend: Fettle Pumpkin Powder.
If you want a deeper look at gut support, probiotics, hydration products, and how to choose supplements without wasting money, read: Dog Supplements Explained: What Really Works.
4) Keep Them Out of the Buffet (Garden and Walk Scavenging)
During recovery, supervise garden time closely. Keep the back door shut and only allow access when you are there. One extra mouthful of compost can undo your good work fast.
A long line can help if needed. Think of it as their personal VIP escort service.
You can also make life easier by teaching a really strong attention habit. A good dog name response gives you a simple way to interrupt interest in something on the floor before your dog fully commits to eating it. In real life, that can be the opposite of scavenging.
If your dog is also eating poo, this can increase the chance of recurring gut upsets and parasite exposure. Start here: Does Your Dog Eat Its Own Poo?.
5) Keep Things Calm (Stress Can Affect Digestion)
Stress and over-arousal can play a role in digestive upset, so keep things calm for a few days and encourage rest at home while their gut settles. Less excitement, fewer visitors, shorter walks, more sniffy decompression in low-distraction places.
Sleep is one of the most underrated recovery tools you have. If you want to go deeper on why rest matters for regulation and resilience, read: The Importance of Sleep for Dogs.
How Long Should Dog Diarrhoea Last?
For mild cases caused by scavenging or a simple tummy wobble, stools often start improving within 24 to 48 hours once you support hydration, simplify food, and stop extra treats and chews.
If stools are not improving, your dog seems unwell, or you are seeing repeated watery episodes, it is time to contact your vet.
What Not To Do (Common Mistakes)
- Do not keep adding new foods, toppers, treats, and chews to tempt them. Keep it simple.
- Do not give human anti-diarrhoea medication unless your vet has specifically told you to.
- Do not ignore repeat episodes that happen often. Recurring diarrhoea needs a proper plan.
- Do not continue with rich chews, fatty treats, or lots of training food until stools are normal again.
- Do not try to make your dog sick at home if you suspect poisoning unless your vet specifically tells you to.
Aftercare: When Can You Reintroduce Treats and Chews?
Once stools are back to normal for 48 hours, reintroduce extras slowly. Start with tiny amounts and keep everything boring for a bit. This is where many dogs relapse, not because they are “still ill”, but because the gut has not fully settled and a rich chew lands too soon.
If Your Dog Refuses Food or Treats
If your dog is refusing food or treats alongside diarrhoea, treat it as useful information. It can happen with stress, nausea, pain, or when a dog simply feels a bit rough. If the refusal is sudden or unusual for your dog, it is worth checking in with your vet.
This article can help you troubleshoot what treat refusal might mean: 5 Reasons Dogs Refuse Treats.
Recurring Diarrhoea Plan (Stop the Firefighting)
If your dog gets diarrhoea repeatedly, the goal is to stop guessing and start building a simple evidence-based plan. Here is what I recommend owners do next.
- Keep a 7-day diary: meals, treats, chews, scavenging incidents, stressy days, medication, and stool quality.
- Get a vet plan: if it is recurring, a vet may suggest a stool sample check, parasite plan, or a deeper investigation if there are red flags.
- Stabilise the diet: avoid constant switching and topping with random extras while you are trying to find patterns.
- Use structured feeding: this helps you monitor appetite and makes it easier to spot changes quickly.
- Reduce gut load: keep extras under control. Rich chews and lots of treats can be a common hidden trigger.
- Prevent scavenging: management is a health tool as much as a training tool.
If you want to go deeper on food quality, sensitive stomachs, and how to switch foods sensibly without triggering more loose stools, read: Best Dog Food for Healthy Dogs.
And if your dog is a grazer, or you want clearer appetite monitoring, which matters with recurring digestive issues, this is worth a read too: Avoid Leaving Dog Food Down.
If recurring tummy upsets are leading to repeat vet bills, prescriptions, or gut support purchases, this may also be useful from a practical point of view: How to Save Money on Dog Medication.
FAQ
What can I give my dog for diarrhoea at home?
For mild cases where your dog is otherwise bright and drinking, focus on hydration first, pause treats and chews, feed smaller meals more often, and consider gut support like a binder such as Pro-Kolin or gentle fibre such as pumpkin. If your dog seems unwell, has blood in the stool, is vomiting, or symptoms last more than 24 hours, contact your vet.
How long should dog diarrhoea last?
Mild diarrhoea often starts improving within 24 to 48 hours once you simplify food, stop extras, and support hydration. If it is not improving, is worsening, or your dog seems off, speak to your vet.
Should I stop feeding my dog if they have diarrhoea?
Hydration is the priority. In many mild cases, you can keep feeding their normal food but reduce portions and split into small, frequent meals. Avoid adding lots of new foods or rich treats. If your dog refuses food entirely, seems unwell, or you are worried, contact your vet.
Why does my dog keep getting loose stools?
Repeated loose stools are often linked to scavenging, too many rich extras such as chews and treats, stress and poor rest, parasites, food sensitivity, medication side effects, or frequent diet changes. If it is happening regularly, it is worth speaking to your vet and tracking patterns so you can build a long-term plan.
When should I call the vet for dog diarrhoea?
Contact your vet urgently if there is blood in the stool, very watery diarrhoea, repeated vomiting, signs of dehydration, abdominal pain, collapse, or if your dog is very young, old, or has underlying conditions. If symptoms last more than 24 hours or worsen, call your vet.
Helpful Products:
