Companion Animal Welfare

Cat Welfare and Hyperthyroidism Management

Hyperthyroidism is the most common endocrine disorder of older cats. Left untreated it causes significant chronic suffering. Multiple effective treatments are now available.

Key Facts

Hyperthyroidism affects approximately 10% of cats over ten years old
Clinical signs include weight loss despite increased appetite, hyperactivity and poor coat condition
Radioactive iodine treatment is curative and considered the gold standard treatment
Daily oral medication with methimazole or carbimazole is effective but requires lifelong compliance
Thyroid-restricted iodine diet is an alternative for cats intolerant of other treatments

Welfare Considerations

Untreated hyperthyroidism causes months or years of unnecessary chronic suffering in cats. Early diagnosis through regular senior health checks enables prompt, effective treatment.

What You Can Do

Schedule annual blood screens for cats over eight years old including thyroid function
Discuss radioactive iodine therapy with a specialist if your cat is diagnosed with hyperthyroidism
Monitor treated cats regularly for signs of recurrence or concurrent kidney disease