A dog with a digestive problem may first seem less interested in food or start licking its lips. Later signs can include vomiting, loose stool or abdominal discomfort. Because digestive symptoms overlap with illnesses affecting other organs, the pattern and the dog’s overall condition matter more than any single symptom.
Common early signs
- New changes in appetite, nausea or increased drooling
- Vomiting, effortless regurgitation or attempts to retch
- Loose stool, diarrhea or straining to defecate
- Abdominal pain, a hunched posture or reluctance to move
- Bloating, weight loss or a change in normal behavior
The Merck Veterinary Manual’s digestive disease overview describes how these findings can help localize a problem, while emphasizing that different diseases may share symptoms.
When it is an emergency
Repeated unproductive retching with a swollen abdomen, collapse, severe abdominal pain, breathing difficulty or suspected ingestion of a dangerous object or toxin require immediate in-person care. Persistent vomiting that prevents drinking, significant bloody diarrhea, severe weakness or signs of dehydration also deserve urgent veterinary attention. Puppies and dogs with serious underlying conditions can worsen faster.
Vomiting is not the same as regurgitation
Vomiting usually involves nausea, abdominal contractions and forceful expulsion. Regurgitation is typically more passive and may return undigested material shortly after eating. The distinction changes which problems a veterinarian considers. If safe, a brief video can help describe the episode.
Possible causes
Dietary changes, eating spoiled material, parasites, infections, gastrointestinal inflammation, swallowed objects and pancreatitis can cause digestive symptoms. Kidney, liver and endocrine disorders may also lead to vomiting or poor appetite. The fact that a dog seems to have “an upset stomach” does not establish that the stomach itself is the cause.
Practical information to gather
- When signs started and how often episodes occur
- Food, water intake, stool and urination changes
- Any blood in vomit or stool
- Recent diet changes, medications, scavenging or toxin exposures
- Existing health conditions and recent weight changes
Your veterinarian may recommend a physical exam, fecal test, blood or urine tests or imaging, depending on the signs. Severe symptoms are not appropriate for diagnosis through a chat alone.
What to avoid while waiting for advice
Do not give human painkillers, anti-diarrhea drugs or leftover antibiotics. Avoid forced feeding or attempting to induce vomiting without veterinary direction. Keep fresh water available unless the treating veterinarian gives specific instructions, and ask for individualized dietary guidance for puppies and ill adult dogs.
Related guides: dog vomiting and dog diarrhea.
Source: Merck: introduction to digestive disorders in dogs.
Education only; veterinary examination and testing establish a diagnosis.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.