Radioiodine therapy is the gold standard curative treatment for feline hyperthyroidism. Understanding the procedure, its welfare implications, and post-treatment care helps owners make informed decisions.
Radioiodine therapy resolves hyperthyroidism permanently in the vast majority of cats, eliminating the need for daily medication and the risks of prolonged medical management. The primary welfare concern is the mandatory post-treatment isolation period: cats must remain in a specialist facility until radiation levels drop to legally permitted levels. For many cats, this separation from familiar environments and people causes stress. Facilities with enriched environments and regular social contact from radiation-trained staff can significantly reduce this stress. The welfare balance — temporary hospitalisation versus months or years of twice-daily medication and the risks of medical management failure — strongly favours radioiodine for most cats.