Five common cat illnesses every owner should know about

Brian Faulkner - Article expert
Brian Faulkner
Veterinary Surgeon
RCVS Registered
Read it in 4 minutes
With the help of Petplan veterinary expert Brian Faulkner, we look at key symptoms to watch out for in cats, and how to help your sick pet.

Quick Links

Here at Petplan, keeping your pet healthy and happy is our number one priority. Many pet owners assume that accidents are the biggest risk their pet faces, yet 90% of the claims we receive are for ill health rather than injuries.

Here, we round up some of the most common conditions your cat might experience – and what you can do about them.

Gastrointestinal (or digestive) disorders in cats can have many different causes, ranging from something they ate to bacterial infections, viruses or conditions such as inflammatory bowel disease.

While occasional stomach upsets in cats are not unusual and likely to be short-lived, do keep an eye on your pet. They may be weak, in discomfort and at risk of (potentially dangerous) dehydration.

The most common symptoms of gastrointestinal disorders in cats include vomiting, diarrhoea, poor appetite, weight loss, straining to pass stools, constipation or lack of energy.

These may occur suddenly or develop gradually over a longer period.

If your cat has a minor stomach upset, offer them plenty to drink, followed by bland, easily digestible meals after 24 hours.

But if you’re worried about the severity of their symptoms, or they’re getting sick regularly, see a vet to investigate possible underlying causes.

Just like humans, cats can suffer from a range of heart conditions, particularly in mid- to later life – although in rare cases, kittens may be born with congenital heart problems. The most common type of heart disease in cats is hypertrophic cardiomyopathy, a thickening of the heart muscle that prevents it from pumping blood efficiently. Influenced by genetics, this progressive disease can be managed with the right treatment.

Other heart problems in cats include high blood pressure, and hyperthyroidism (see below) can sometimes lead to heart problems in cats.

Heart disease in cats can be very hard to spot until it becomes serious, but low energy or panting may indicate a problem.

Your vet may pick up a heart murmur or an abnormal heart rhythm at a routine health check.

Make sure your cat has regular vet check-ups – ideally at least once a year, or more if they’re elderly.

Heart problems may sound worrying, but the good news is that many conditions can be managed with medication, careful monitoring and a healthy diet and exercise regime.

Cats of all breeds and ages can suffer from feline asthma.

Other causes of feline respiratory (breathing) problems include heart disease, bacterial and viral infections, inhalation of toxins, and lung and airway disorders or obstructions.

Symptoms of respiratory problems include coughing (which may occur in fits and starts), wheezing and other breathing difficulties.

Other indicators of an underlying problem include your cat being off their food and becoming lethargic.

Your vet will be able to help investigate any signs of respiratory illness. You should definitely get your cat checked if a suspected chest infection comes on suddenly, as wheezing can also be a symptom of cat bronchitis.

If your cat is diagnosed with asthma, you can help manage the condition at home with cat-specific inhalers and nebulisers.

Urinary problems in cats are often part of a wider complex of symptoms that vets call feline lower urinary tract disease (FLUTD). FLUTD can affect the bladder and/or urethra. Cystitis means inflammation of the bladder. It is common for pet owners to assume that cystitis is due to a urinary tract infection (UT). While UTIs can occur, cystitis is more commonly due to other underlying health conditions, such as bladder crystals or stones, as well as tumours, diabetes or stress.

Another urinary system problem, which is particularly common in older cats, is kidney disease (or kidney failure). This means their kidneys gradually stop filtering out toxins and reabsorbing water. Although irreversible, the correct diet and treatment can help slow the condition.

Watch out for any changes to your cat’s regular toilet habits, such as peeing in the wrong places or excessive cleaning after urination.

Cystitis results in frequent, painful attempts to urinate, sometimes with blood in the cat’s urine. Symptoms of kidney disease include increased thirst, weight loss and passing more urine than usual.

A trip to the vet will help diagnose your pet’s particular problem, and help relieve any discomfort and slow down the progression of the issue.

While you can’t always prevent urinary tract disease, you can help keep your cat healthy by feeding an appropriate diet, encouraging them to drink regularly and maintain a healthy weight, and tackling any causes of stress (overweight or stressed-out moggies are more prone to UTIs).

Your cat’s thyroid glands are located in their neck, and control their metabolism. Hyperthyroidism, when the glands become overactive, is a common hormonal condition in cats.

A large number of cases are due to a benign (non-cancerous) swelling in the gland itself.

Symptoms of hyperthyroidism in cats can include an increased appetite, yet also a loss of weight, drinking more, sickness, diarrhoea and lethargy.

If left untreated, hyperthyroidism can lead to heart failure, so do consult your vet.

They will be able to recommend treatments to help ease the condition, or, if appropriate, surgery to remove the thyroid gland.

Brian Faulkner - Article expert
Petplan Vet Expert

Brian is a long standing vet and President of the UK Society of Practising Veterinary Surgeons. He's worked in more than 250 veterinary practices as a clinician, consultant and confidence coach. Brian holds several academic positions, is a keynote speaker and the founder of Colourful CPD, and organisation providing training for veterinary practices.

Brian co-writes our articles on pet health, where we cover everything from common conditions to supporting your pet after an operation.

Find out more about Brian

Follow us

Petplan is a trading name of Pet Plan Limited (Registered in England No. 1282939) and Allianz Insurance plc (Registered in England No. 84638), Registered office: 57 Ladymead, Guildford, Surrey GU1 1DB.

Pet Plan Limited is authorised and regulated by the Financial Conduct Authority. Financial Services Register No. 311969. Allianz Insurance plc is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. Financial Services Register No. 121849. Pet Plan Limited is a subsidiary of Allianz Insurance plc. Fitz All Media Limited is an Appointed Representative of Pet Plan Limited.