Hyperthyroidism is the most common endocrine disorder in older cats, causing significant physical deterioration if left untreated. Fortunately, it is highly treatable with multiple effective options available.
Cats with undiagnosed hyperthyroidism experience a confusing array of symptoms — hunger alongside weight loss, hyperactivity alongside weakness — that cause real daily discomfort. Secondary heart disease and hypertension add serious welfare dimensions. The condition is insidious in onset and often attributed to normal ageing. Early diagnosis through routine senior screening dramatically improves outcomes. All treatment options have good welfare outcomes when monitored appropriately.