Feline hyperthyroidism is one of the most common endocrine conditions in older cats, and treatment choice significantly affects quality of life and long-term welfare outcomes.
Hyperthyroidism treatment choice involves genuine welfare trade-offs between different interventions. Daily tablet or transdermal medication is accessible and low cost but imposes a chronic treatment burden on the cat and owner. Radioactive iodine offers a cure through a single treatment but requires 2-3 weeks of isolation from the owner during radioactive decay, causing significant social stress for bonded cats. Surgery is curative but carries anesthetic risk in older cats. Dietary management using iodine-restricted food requires strict adherence. The welfare-optimal choice depends on individual cat temperament, owner capacity for daily medication, and clinical factors. Early diagnosis and treatment prevents the significant suffering of uncontrolled disease.