Does My Dog Have a Stomach Bug?
Dogs can't tell you they feel unwell, but a stomach bug produces recognisable signs: vomiting, diarrhoea, loss of appetite, lethargy, and general misery. Most cases in dogs are mild and resolve within 24 to 72 hours. Some require veterinary attention. Knowing the difference matters.
What Is a Dog Stomach Bug?
Viral gastroenteritis. Parvovirus is the most serious viral cause and is life-threatening in unvaccinated dogs. Less severe viral infections tend to resolve on their own within a few days. Bacterial infections. Salmonella, Campylobacter, and E. coli can all cause acute gastrointestinal illness in dogs. Dietary indiscretion. Eating something they shouldn't is the most common cause of what owners describe as a stomach bug. The gut reacts to the offending content and the dog spends 24 to 48 hours being sick before recovering. Parasite infections. Giardia is a particularly common cause of persistent diarrhoea in dogs. Parasites require specific treatment.
Dog Stomach Flu Symptoms
Common signs include vomiting, diarrhoea (loose, watery, or frequent), reduced appetite or complete food refusal, lethargy and reluctance to move, mild fever, and signs of abdominal discomfort.
When to See a Vet
Veterinary care is needed when symptoms are severe or not improving after 48 hours, the vomit or stools contain blood, the dog shows signs of significant dehydration, the dog is very young, old, or has a compromised immune system, you suspect parvovirus, or you think the dog ate something toxic.
Home Management for a Mild Dog Stomach Bug
Rest the gut. Withhold food for 4 to 6 hours after vomiting stops, then offer small amounts of bland food like boiled chicken and rice. Keep the dog hydrated. Offer water in small frequent amounts. Monitor closely. Watch for deterioration. If things aren't clearly improving within 48 hours, call your vet.
Gut Recovery After a Dog Stomach Bug
A gastrointestinal infection leaves the gut microbiome significantly disrupted. Without active support it can take weeks to return to normal. Probiotics reintroduce beneficial bacteria and, alongside postbiotic support, help restore the gut lining and microbial balance faster.
Tummy Time Liquid Probiotics (500ml)
Ideal for the recovery phase. Pour over food to deliver probiotic bacteria and Zoonatant postbiotic support in a format a recovering dog can manage.
Shop Tummy Time Liquid Probiotics
Dog Detox and Digestive Balance Meal Topper Powder (60g)
Once normal eating is restored, this synbiotic formula provides deeper microbiome rebuilding. The prebiotic, probiotic, and postbiotic combination works together to restore microbial diversity and strengthen the gut lining against future infections.
Shop Dog Detox and Digestive Balance
Frequently Asked Questions
How long does a dog stomach bug last?
Most mild stomach bugs in dogs resolve within 24 to 72 hours. If symptoms persist beyond 48 hours without clear improvement, veterinary assessment is warranted.
Can dogs catch stomach bugs from humans?
Most human gastrointestinal viruses do not infect dogs. However, some bacterial causes like Salmonella and Campylobacter can be shared between species, so basic hygiene when handling a sick dog is sensible.
How do I prevent my dog getting stomach bugs?
Keeping vaccinations current, preventing access to garbage and carcasses, regular parasite treatment, and maintaining a resilient gut microbiome through daily probiotic supplementation all reduce the frequency and severity of gastrointestinal illness.