{ "@context": "https://schema.org", "@type": "BlogPosting", "headline": "The most common diseases of the senior cat — kidney failure, thyroid gland and pain", "description": "Is your old cat losing weight or drinking a lot? Senior cats often suffer from hidden diseases. Read the veterinarian's list of the top 3 most common ailments.", "datePublished": "Jan 24, 2026", }

The most common diseases of the senior cat — kidney failure, thyroid gland and pain

📞 Senior examinations of cats in Vantaa: 010 739 9130

Cats are living longer than ever these days -- 15 or even 20 years of age is not uncommon. As the cat ages (more than 10-12 years), the risk of certain chronic diseases increases significantly.

Since the cat is a master at masking the symptoms, the owner must be a secret police officer. Here are the “big three” that plague old cats.

1. Renal failure (CKD)

By far the most common cause of death for old cats. The kidneys lose their ability to filter slag substances from the blood.

  • Symptoms: Increased drinking and urination, weight loss, poor appetite, vomiting.
  • Treatment: Can not be cured, but the progression is slowed down by diet and medication. Early detection by blood tests is vital.

2. Hyperthyroidism (Hyperthyroidism)

The thyroid gland goes into overdrive and speeds up the metabolism.

  • Symptoms: The cat loses weight drastically despite eating enormously (“lean glutton”), is restless, screams at night, and the fur becomes tangled.
  • Treatment: Medication, iodine diet or radioiodine therapy. When treated, the prognosis is excellent.

3. Osteoarthritis and pain

More than 90% of cats over the age of 12 have osteoarthritis. However, it is not recognized because the cat is not lucky.

  • Symptoms: The cat no longer jumps high (or hesitates), sleeps more, does not wash its fur from its back, or is grumpy when handled.
  • Treatment: Pain relief with oral medications, injection treatments, or dietary supplements.

How do you keep a senior healthy?

Recommended for all cats over 10 years Annual Seniors Review, which includes extensive blood tests and blood pressure measurement.

Do not put the symptoms on the “spike of old age”. When cared for, a senior cat can live a quality life for years to come.

📍 Veterinary Hospital Sacrum — Porttisuontie 13, Vantaa

Feline heart disease (HCM) — the “silent killer” and its symptoms

Feline HCM is a common and often asymptomatic heart disease. Identify signs of danger: difficulty breathing or sudden paralysis of the posterior end (thrombus, or blood clot).

27.01.2026
Blog Category
Is your cat coughing or wheezing – could it be asthma?

Is your cat coughing, wheezing, or having breathing attacks? Read when it might be asthma and when an examination is necessary.

15.05.2026
Blog Category
Dog not bearing weight on hind leg – when to see a vet?

Is your dog not bearing weight on its hind leg or hopping on three legs? Find out when it might be a cruciate ligament injury, fracture, or another ailment requiring veterinary care.

26.05.2026
Blog Category
Your dog's breath smells bad – could it be a dental disease?

Does your dog's breath smell bad? Read when bad breath can indicate tartar, gingivitis, or other oral diseases.

11.05.2026
Blog Category
Ear infection in dogs - why does it recur?

Is your dog bothered by constant ear twitching? Otitis is rarely an independent disease. Learn why an allergy or structure predisposes to inflammation and how to break the thread.

27.01.2026
Blog Category
The cat is breathing heavily -- is it an emergency?

Does the cat breathe with its mouth open or groan? This is always a serious symptom. Read the veterinarian's instructions on why a cat's breathing difficulty requires an immediate emergency visit.

27.01.2026
Blog Category