When to Worry: Red Flags in Pet Digestive Upsets

Vomiting, diarrhoea or an off-food day can happen to even the healthiest pets. Sometimes, these symptoms are caused by a minor digestive upset that settles quickly. Other times, they can be a sign of something more serious that needs veterinary attention.

Knowing what to look for can help you recognise when your pet needs a little extra care and when it is time to seek help.

Common signs of digestive upset

Digestive problems can affect both dogs and cats, although the symptoms and underlying causes can vary. Some common signs include:

• Vomiting or retching

• Diarrhoea or unusually soft stools

• Reduced appetite or refusing food

• Excessive drooling or lip licking

• Abdominal discomfort or a hunched posture

• Bloating or a swollen-looking abdomen

• Increased or decreased thirst

• Lethargy or changes in normal behaviour

A single episode of vomiting or a mildly loose stool may not always indicate a serious problem, particularly if your pet is otherwise bright, comfortable and behaving normally. However, it is important to consider the whole picture, including how frequently symptoms occur, how severe they are and whether your pet is showing any other signs of illness.

Red flags you should never ignore

Some digestive symptoms can indicate a medical emergency. If your pet displays any of the following warning signs, seek veterinary advice promptly.

1. Repeated vomiting or an inability to keep water down

Occasional vomiting can occur for several reasons, but repeated episodes are more concerning. Frequent vomiting can lead to dehydration and may be associated with conditions such as pancreatitis, intestinal obstruction or poisoning.

If your pet vomits repeatedly, cannot keep water down or appears increasingly unwell, contact us or an emergency vet urgently. Do not wait for symptoms to settle if your pet is deteriorating.

2. Blood in vomit or faeces

Blood in your pet's vomit or stools should always be taken seriously.

Fresh red blood may appear as streaks or spots in the faeces, while black, tarry stools can indicate digested blood from higher in the digestive tract. Blood in vomit may appear bright red or resemble dark coffee grounds.

There are several possible causes, ranging from intestinal inflammation to ulcers, severe infection or other serious conditions. Even if your pet seems relatively well, contact us for advice. Seek emergency care if there is a large amount of blood, black tarry faeces, repeated bloody diarrhoea, weakness or collapse.

3. A swollen abdomen or unproductive retching

A visibly swollen or tight abdomen, particularly when accompanied by repeated attempts to vomit without bringing anything up, is an emergency in dogs.

These signs can indicate gastric dilatation-volvulus (GDV), commonly known as bloat. This life-threatening condition involves the stomach expanding and sometimes twisting, restricting blood flow and causing rapid deterioration.

Other warning signs include restlessness, excessive drooling, pacing, abdominal pain and difficulty getting comfortable.

Do not wait to see whether these symptoms improve. Seek emergency veterinary care immediately.

4. Severe abdominal pain

Pets experiencing abdominal pain may not cry out or make their discomfort obvious. Instead, you might notice that your dog or cat:

• Hunches over or adopts an unusual posture

• Has a tense or painful abdomen

• Repeatedly stretches into a bowing position

• Becomes restless or hides away

• Resists being picked up or touched around the belly

• Growls, hisses or reacts unexpectedly when handled

Severe abdominal pain can be associated with conditions such as pancreatitis, intestinal obstruction or other abdominal emergencies. A painful or rapidly worsening abdomen warrants urgent veterinary assessment.

5. Signs of dehydration or weakness

Vomiting and diarrhoea can cause pets to lose significant amounts of fluid, particularly when symptoms are frequent or prolonged.

Watch for unusual tiredness, weakness, reduced urination, dry or sticky gums and sunken-looking eyes. Dehydration can become serious quickly, especially in puppies, kittens, elderly pets and animals with existing medical conditions.

If your pet is weak, struggling to stand, collapsing or becoming less responsive, seek emergency veterinary care.

6. Suspected poisoning or eating something dangerous

Pets are naturally curious, and their digestive systems can pay the price when they eat something they should not.

Potential hazards include toxic foods, certain human medications, household chemicals, poisonous plants, rubbish, bones, toys, fabric and other foreign objects. Some substances can cause severe damage even before obvious symptoms develop.

If you suspect your pet has swallowed something toxic or a foreign object, contact us or an emergency vet immediately, even if they appear normal.

Do not attempt to make your pet vomit unless specifically instructed by a veterinary professional. Some substances can cause additional damage when brought back up, and inducing vomiting is not appropriate in every situation.

When is it time to book a vet appointment?

Not every digestive upset requires an emergency visit, but persistent or recurring symptoms should never be ignored.

Arrange a veterinary appointment if your pet:

• Has vomiting or diarrhoea that persists or keeps returning

• Has a noticeably reduced appetite or refuses food

• Is losing weight without an obvious explanation

• Has a persistent change in bowel habits

• Shows signs of discomfort when eating or passing stools

• Has digestive symptoms alongside changes in thirst, urination or energy levels

The appropriate timeframe depends on your pet's age, health and symptoms. Puppies, kittens, senior pets and animals with existing health conditions may need assessment sooner.

Cats require particular attention when they stop eating. If your cat refuses food, contact us promptly rather than waiting several days, as prolonged inadequate food intake can lead to serious complications.

Can you manage a mild digestive upset at home?

If your adult pet has had one mild episode of vomiting or a small amount of loose stool but remains bright, comfortable and otherwise normal, careful monitoring may be reasonable.

You can help by:

• Providing access to fresh, clean water without forcing your pet to drink.

• Keeping your pet quiet and comfortable.

• Avoiding rich foods, table scraps and sudden dietary changes.

• Monitoring appetite, water intake, energy levels and toilet habits.

• Contacting us if symptoms persist, worsen or new signs develop.

Avoid giving human medications or leftover veterinary medicines without professional advice. Some common medications can be harmful to pets, and the right treatment depends on the underlying cause.

Do not withhold food from puppies, kittens or cats without veterinary guidance. If your pet is vomiting repeatedly, cannot keep water down or appears unwell, home monitoring is not appropriate.

What information should you give our vets?

A few simple observations can help our vets assess your pet and decide what investigations or treatment may be needed.

If possible, take note of:

• When symptoms started: Have they been present for a few hours or several days?

• How often they occur: How many times has your pet vomited or passed diarrhoea?

• What you have noticed: Is there blood, unusual colour, mucus or anything that looks like a foreign object?

• Eating and drinking habits: Is your pet eating normally and keeping water down?

• Possible exposures: Could they have eaten rubbish, a new food, medication, a plant or a toy?

• Other changes: Have you noticed lethargy, weight loss, pain or changes in urination?

Photos of vomit or stools can sometimes be helpful, and a fresh stool sample may be useful if our vets request one. However, never delay urgent treatment to collect a sample.

The bottom line: trust your instincts

A mild digestive upset may settle without treatment, but vomiting and diarrhoea can also be early signs of a more serious condition. The key is to recognise when symptoms are unusual, persistent or accompanied by other warning signs.

If your pet seems significantly different from their usual self, is getting worse or you are worried about their condition, contact us for advice. It is always better to ask the question than to wait until a potentially serious problem becomes more difficult to treat.