Is Your Cat Losing Weight? Understanding Hyperthyroidism

Is Your Cat Losing Weight? Understanding Hyperthyroidism

Hyperthyroidism is a common endocrine disorder in older cats, caused by the overproduction of thyroid hormone. It can affect your cat’s metabolism, appetite, and overall health. At Paws & Co Veterinary Centre, we help cat owners recognise early signs, diagnose the condition, and manage it effectively to ensure a good quality of life.

What is Hyperthyroidism?

Hyperthyroidism occurs when a cat’s thyroid glands produce too much thyroid hormone. This hormone regulates metabolism, and an excess can lead to weight loss, increased appetite, and other serious health issues. Most affected cats are over 10 years old, but it can occasionally occur in younger cats.

Causes and Risk Factors

The exact cause of hyperthyroidism is unknown, but potential factors include:

  • Age (older cats are at higher risk)

  • Diet and environmental factors

  • Thyroid gland nodules or adenomas

Hyperthyroidism is not contagious and cannot be passed between cats.

Signs and Symptoms

Common signs to watch for include:

  • Unexplained weight loss despite increased appetite

  • Increased thirst and urination

  • Hyperactivity or restlessness

  • Vomiting or diarrhoea

  • Poor coat condition

  • Rapid heartbeat or heart murmurs

If you notice these symptoms, book a veterinary appointment promptly, as early treatment improves outcomes.

Diagnosis

Your veterinarian can diagnose hyperthyroidism through:

  • Physical examination – palpating the thyroid glands for enlargement

  • Blood tests – measuring thyroid hormone levels

  • Additional tests – such as blood pressure checks and heart monitoring if needed

Early detection helps prevent complications like heart disease, kidney issues, or high blood pressure.

Treatment Options

Hyperthyroidism can be managed through several methods:

  1. Medication – Daily oral medications reduce thyroid hormone production.

  2. Radioactive iodine therapy – A one-time treatment that targets overactive thyroid tissue.

  3. Surgery – Thyroidectomy to remove affected thyroid tissue.

  4. Dietary management – Prescription diets that limit iodine intake can help control hormone production.

Your vet will recommend the best option based on your cat’s age, health, and lifestyle.

How Our Clinic Can Help

At Paws & Co Veterinary Centre, we offer:

  • Early diagnosis and screening for older cats

  • Tailored treatment plans including medication, surgery, or diet

  • Monitoring and follow-up care to track thyroid hormone levels and overall health

  • Advice on managing symptoms at home to ensure your cat stays comfortable

Frequently Asked Questions (FAQs)

Q: Can hyperthyroidism be cured?
A: Some treatments, like radioactive iodine therapy or surgery, can be curative. Medications manage the condition long-term.

Q: Is hyperthyroidism common in all cats?
A: It is most common in cats over 10 years old, though younger cats can occasionally develop it.

Q: How quickly should I seek veterinary care?
A: As soon as you notice symptoms like weight loss, increased appetite, or hyperactivity, book an appointment. Early intervention reduces the risk of complications.

Q: Can indoor cats get hyperthyroidism?
A: Yes, hyperthyroidism is not linked to outdoor exposure and can affect indoor cats as well.

Take Action Today

Hyperthyroidism can affect your cat’s quality of life, but with early detection and proper management, most cats live comfortably for many years. Contact Paws & Co Veterinary Centre to:

  • Schedule a thyroid health check for your older cat

  • Discuss treatment options tailored to your cat’s needs

  • Get guidance on monitoring and managing symptoms at home

 

Back to blog