Radioiodine (I-131) therapy is the gold-standard curative treatment for feline hyperthyroidism, offering permanent resolution of the condition with minimal side effects — but welfare considerations during the required isolation period need careful management.
Radioiodine therapy offers a significant long-term welfare benefit by permanently resolving a debilitating chronic condition. However, the isolation period required after treatment causes acute welfare costs — cats are separated from their owners and home environment for one to four weeks in a veterinary setting. This period of social isolation and unfamiliar confinement causes stress that is particularly significant for cats with poor hospital tolerance. Facilities that provide environmental enrichment, owner scent items and regular low-stress interaction during isolation substantially improve cat welfare during this period. For cats that tolerate it poorly, the welfare benefits of permanent cure must be weighed against the acute isolation distress.