Radioiodine therapy offers a one-time curative treatment for feline hyperthyroidism with excellent welfare outcomes and minimal ongoing medication burden.
Feline hyperthyroidism causes significant suffering - weight loss despite ravenous appetite, hypertension, cardiac changes, anxiety, and reduced quality of life. Long-term medical management with daily medication is effective but imposes a daily handling stress for many cats resistant to pill administration. Radioiodine eliminates the underlying disease with a single treatment, removing both hyperthyroid suffering and medication-related stress. The hospitalization period is a welfare consideration, but the long-term welfare gain from cure versus chronic management is substantial for most cats.