First, is it actually the food?

Not every upset stomach is a food problem. Before you change anything, rule out the things that need a vet:

Blood in the stool, vomiting that lasts more than a day, sudden weight loss, a puppy with diarrhoea, or a dog that's lethargic and refusing water. None of those are "try a new kibble" situations. Get to your vet first.

Worms are another common culprit in South Africa that gets mistaken for a sensitive stomach. If your dog isn't dewormed every three months, start there before blaming the food.

If your dog is otherwise happy and healthy but regularly produces soft stools, passes a lot of gas, eats grass obsessively, or vomits bile in the mornings, then diet is the most likely suspect. That's what the rest of this guide covers.

Sensitive stomach or food allergy? They're not the same thing

This trips a lot of people up. A true food allergy is an immune response, and it usually shows up on the skin: itching, ear infections, paw licking. A sensitive stomach is a digestive issue: the gut struggles to process something in the food, so you get loose stools, gas and vomiting.

There's overlap, and some dogs have both. But the distinction matters because the solutions differ. If your dog is scratching more than squelching, read our guide to hypoallergenic dog food instead. If the problem lives mostly in the gut, keep reading.

What to look for on the bag

After years of helping customers through this exact problem, these are the things that actually make a difference:

One named animal protein. Foods built around a single protein source, like lamb, salmon or duck, give a struggling gut less to deal with. It also makes it much easier to work out what your dog can't tolerate. "Meat and animal derivatives" on a label tells you nothing, and if the recipe changes batch to batch, your dog's stomach will let you know.

A short ingredient list. Fewer ingredients means fewer suspects. Limited-ingredient diets exist for exactly this reason.

Moderate fat. Very rich, high-fat foods are hard work for sensitive digestion. This is worth knowing because some premium foods are deliberately rich. A food can be excellent quality and still be wrong for your dog.

Prebiotics and probiotics. Ingredients like chicory root, pumpkin and dried fermentation products feed the good bacteria in the gut. We wrote a full piece on why gut health changes everything if you want the detail.

No mystery fillers. Undisclosed grain blends and vague by-products are where most digestive trouble hides.

One thing you don't necessarily need: grain-free. Grains get blamed for a lot, but genuine grain intolerance is less common than the marketing suggests. Rice and oats are gentle on most dogs. Maize-heavy budget foods are a different story, but that's a quality issue, not a grain issue.

Our honest picks

We stock a lot of brands, so we can afford to be straight with you about which ones we'd feed our own dogs with dodgy digestion.

Acana Singles is where we usually start. Each recipe is built around one animal protein, half the ingredients are animal-based, and the range gives you options to rotate through if the first protein doesn't suit. Grass-Fed Lamb is our most recommended recipe for sensitive stomachs, full stop. It's not the cheapest bag on the shelf, but the feeding quantities are smaller than budget foods, so the per-day cost gap is narrower than the price tag suggests.

Taste of the Wild Pacific Stream uses salmon as its main protein, which many dogs with chicken fatigue do brilliantly on, and it includes proprietary probiotics added after cooking so they actually survive to reach the bowl. It's also one of the more affordable ways into the natural food category.

Diamond Naturals is our value pick. The Lamb & Rice recipe is gentle, includes the same post-cooking probiotics as Taste of the Wild (they come from the same family of makers), and won't wreck your budget. If you're currently feeding a supermarket brand and your dog's stomach is complaining, this is a sensible first step up.

Weruva wet food earns a mention for a different reason: moisture. Some dogs with touchy stomachs do better with wet food mixed into their kibble, both for hydration and because it slows down the gobblers. Weruva's recipes are made with human-grade ingredients and read like actual food. A spoonful as a topper is a low-risk way to test whether wet food helps.

Orijen deserves an honest caveat. It's arguably the best dog food we sell, but it's protein-dense and rich, and some sensitive dogs find it too much. If your dog has a robust gut and you want the best, Orijen is superb. If you're here because of soft stools, start with Acana Singles instead and consider moving up later.

About that Greek yoghurt

One of the most common questions we get: can I give my dog Greek yoghurt for an upset stomach?

Short answer: a small spoonful of plain, unsweetened Greek yoghurt is fine for most dogs and adds a little natural probiotic. But it's a garnish, not a fix. Many adult dogs are lactose intolerant to some degree, so for the dog you're reading this article about, dairy can just as easily make things worse. Plain cooked pumpkin is a safer soothing add-in, and a proper canine probiotic does the yoghurt's job far better.

How to switch food without making everything worse

This is where most sensitive stomach stories go wrong. A sudden food change will upset even a healthy gut, so switch slowly over 7 to 10 days:

Days 1 to 3: 25% new food, 75% old. Days 4 to 6: half and half. Days 7 to 9: 75% new. Day 10: fully switched. If stools go soft at any stage, hold that ratio for a few extra days before moving on.

Then give it time. A fair trial of a new food is six to eight weeks, not one bag. Keep treats boring and consistent during the trial, otherwise you won't know whether it's the food or the biltong working against you.

When the new food doesn't fix it

If you've done a slow transition, given it eight weeks on a quality single-protein food, kept deworming up to date, and the problems persist, stop experimenting and see your vet. Chronic digestive issues can point to pancreatitis, inflammatory bowel disease or parasites, and no bag of food fixes those.

For everything else, which is most dogs, the right food genuinely does change things. Firmer stools, less gas, a dog that actually looks forward to dinner. That's usually visible within a month, and it's one of the most satisfying problems we get to help solve.

Browse our full sensitive stomach range or chat to us on WhatsApp if you'd like a recommendation for your specific dog. We've probably met a stomach like theirs before.

FAQs

What is the best dog food for a sensitive stomach and diarrhoea?

A single-protein, limited-ingredient food with moderate fat and added probiotics. Acana Singles Grass-Fed Lamb is our most recommended option in South Africa, with Diamond Naturals Lamb & Rice as the budget-friendly alternative.

Should I feed grain-free for a sensitive stomach?

Not necessarily. Genuine grain intolerance is uncommon. Gentle grains like rice are fine for most dogs. Focus on protein quality and a short ingredient list instead.

How long before a new food makes a difference?

Allow six to eight weeks on the new food after a 7 to 10 day transition. Some improvement often shows within two weeks, but judge the food on two months, not two days.

Is wet food better for dogs with sensitive stomachs?

It can help, mainly through added moisture and slower eating. A wet topper like Weruva mixed into kibble is an easy way to test it without changing the whole diet.