Hyperthyroidism is the most common endocrine disorder in middle-aged and older cats. Understanding its welfare impact and treatment options helps owners provide good care.
Feline hyperthyroidism causes significant and progressive suffering when left untreated. Affected cats experience the discomfort of an overactive metabolism: weight loss despite voracious appetite, hyperactivity, hypertension, and cardiac complications. The condition is highly treatable and quality of life can be fully restored with appropriate management. Daily methimazole medication controls the condition in most cats but requires lifelong administration. Radioactive iodine therapy is curative in a single treatment and is the preferred option where available and affordable. Dietary management using iodine-restricted food is an alternative for cats that cannot tolerate other treatments. Early diagnosis through routine geriatric health screening is the key to timely intervention.