Hyperthyroidism is the most common hormonal disorder in older cats. Understanding treatment options helps owners and vets make decisions that best support cat welfare.
Untreated feline hyperthyroidism causes significant suffering: affected cats are ravenously hungry yet lose weight, experience rapid heart rate, restlessness, hypertension, and progressive organ damage. Early diagnosis and treatment dramatically improves welfare outcomes. The choice of treatment should consider the individual cat's temperament, the owner's capacity for daily medication, and access to specialist facilities. Radioactive iodine, while requiring a short hospitalisation period, offers the most humane long-term outcome by resolving the condition permanently. Cats on medication require regular veterinary checks to ensure optimal thyroid hormone levels and monitor for side effects. Owners should be alert to subtle behaviour changes indicating recurrence or complications.