Vomiting and Diarrhoea in our pets: When to call the vet

Written by Dr. Josie Gollan

Upset tummies are one of the most common reasons pets are presented to me in the clinic. Vomiting and diarrhoea are extremely frequent, yet many owners find it difficult to know when these symptoms require a visit to the vet.

Why vomiting and diarrhoea can be hard to assess

One of the biggest challenges is that vomiting and diarrhoea are very non-specific clinical signs. They can be caused by a wide range of issues, from mild and self-limiting problems through to serious, life-threatening conditions.

This is why it is so important for pet owners to recognise when these symptoms may be more than just a simple upset stomach.

When vomiting and diarrhoea may be a mild issue

In many cases, mild vomiting and diarrhoea will resolve on their own. Just like us, pets can experience digestive upset due to dietary indiscretion, minor infections, or stress.

In these situations, a short-term change to a bland diet, along with rest and close monitoring, is often enough to get them back on track.

Why ongoing vomiting or diarrhea matters

If vomiting or diarrhoea persists or worsens, it may indicate a more significant underlying issue.

The longer these symptoms continue, the greater the risk of dehydration. If dehydration is left untreated, it can have serious consequences for your pet’s health, making early intervention important.

When should you call the vet for vomiting or diarrhea

If you notice any of the following, it is time to contact your vet:

• Increasing frequency, severity, or duration of vomiting or diarrhoea
• Blood in the vomit or stool
• Loss of appetite lasting more than 24 hours
• Lethargy or weakness
• Changes in behaviour, such as hiding in cats
• Suspected ingestion of a foreign object or toxic substance
• Very young or older pets, as they are more vulnerable to dehydration
• Additional symptoms such as abdominal pain or difficulty breathing

Chronic vomiting in cats is not normal

For cat owners, it is important to understand that regular vomiting is not normal. While cats may occasionally vomit hairballs, vomiting more than once a week without a hairball present is a sign that should be investigated.

Conditions such as inflammatory bowel disease and food intolerances are commonly diagnosed in these cases and require treatment to support your cat’s long-term health.

Knowing when to act

While many cases of acute vomiting and diarrhoea can be managed with simple care at home, knowing when to seek veterinary advice is key.

If you are ever unsure, it is always best to call your vet clinic for guidance. Early assessment and treatment can help your pet recover more quickly and get back to feeling their best.