Companion Animals

Hyperthyroidism in Cats and Welfare Management

Feline hyperthyroidism is a common endocrine disorder in older cats that significantly impacts quality of life if untreated.

Key Facts

Hyperthyroidism is the most common hormonal disorder in cats over 10 years of age
The thyroid gland overproduces hormones causing weight loss, hyperactivity, and heart problems
Left untreated, hyperthyroidism causes hypertension, blindness, and heart failure
Treatment options include medication, radioactive iodine, surgery, or dietary iodine restriction
Early diagnosis and treatment allows most cats to live comfortably for many more years

Welfare Considerations

Untreated hyperthyroidism causes progressive deterioration in cats with significant welfare consequences including muscle wasting, anxiety, high blood pressure, and heart disease. Early diagnosis through routine blood testing allows effective treatment that restores quality of life.

What You Can Do

Schedule annual blood tests for cats over 10 years of age
Learn the signs of hyperthyroidism including weight loss and increased appetite
Ask your vet about the most suitable treatment option for your cat
Support research into prevention of feline hyperthyroidism