Feline hyperthyroidism is the most common hormonal disease in older cats. Understanding treatment options and quality-of-life assessment supports welfare-centred decision-making in later life.
Feline hyperthyroidism is a welfare problem of significant scale given its prevalence in older cats. Untreated, the disease causes chronic discomfort — the cardiac strain, hypertension, and progressive organ damage over months to years represent sustained welfare harms that are entirely treatable. Medical management with daily medication requires careful owner compliance and regular monitoring but is effective and accessible. Radioactive iodine therapy offers a single-treatment cure but requires temporary hospitalisation that can be stressful for cats. The complexity of treatment decisions — particularly when concurrent kidney disease may be unmasked by treating hyperthyroidism — requires careful veterinary guidance. Quality-of-life monitoring throughout treatment ensures that intervention continues to benefit rather than burden the cat.