The timeline for loose stools depends heavily on what else you're seeing. A brief fast poop episode lasting 24-48 hours, where your dog remains bright, playful, and eating normally, often gets back to normal with a bland diet, or temporary removal of food altogether. This pattern is common after sudden diet changes, mild stress, or eating something they shouldn't have (very naughty).
However, loose stools extending beyond two days warrant attention, even if your dog seems otherwise OK. Persistent soft stools can indicate underlying issues ranging from dietary sensitivities to infections or inflammatory conditions affecting the gut lining.
Red flags
Watch for blood or mucus in stools, which can signal inflammation or infection requiring prompt assessment. Repeated vomiting alongside loose stools accelerates dehydration risk, particularly in puppies, senior dogs, or those with existing health conditions. Visible lethargy, refusal to eat, or a tucked, uncomfortable posture all suggest the issue is more than mild upset.
Age and breed considerations
Very young puppies and old dogs dehydrate faster and tolerate digestive upset less well - their safe waiting window may be just 12-24 hours rather than 48. Deep-chested breeds (such as Great Danes) experiencing sudden onset loose stools paired with bloating or restlessness need immediate assessment due to potential GDV risk.
What vets typically look at
During an examination, vets will assess hydration status through skin turgor (how quickly skin returns when pinched), gum moisture, and capillary refill time (how quickly blood flows back into capillaries on a dog's body). They'll feel the abdomen for tenderness, gas buildup, or foreign objects. Faecal scoring systems help quantify stool consistency objectively - ideal stools should be firm, formed, and easy to pick up (1).Trust your instinct.
If something feels off beyond just the loose stools, or if the pattern doesn't improve within 48 hours, get help.
References
Rudinsky AJ, Rowe JC, Parker VJ. Nutritional management of chronic enteropathies in dogs and cats. J Am Vet Med Assoc. 2018;253(5):570-578. Available from: https://avmajournals.avma.org/view/journals/javma/253/5/javma.253.5.570.xml
This content is for general information only and does not replace veterinary advice. Supplements and nutritional products are not licensed veterinary medicines. Always speak to your vet before making changes to your dog’s diet, supplements, or care routine.
