Feline hyperthyroidism has multiple treatment options with different welfare profiles, and the choice should be guided by individual cat circumstances and owner capability.
Untreated hyperthyroidism causes progressive cardiac disease, hypertension and renal decompensation. Treated cats typically show dramatic improvement in demeanour, appetite and weight within weeks. Oral medication cats that resist pilling experience daily stress from forced medicating. Choosing the most appropriate treatment for individual cats requires balancing effectiveness, welfare of administration and owner capacity.