Also called thyrotoxicosis, hyperthyroidism is one of the most common diseases of the middle-aged and older cat. The Winn Feline Foundation describes clinical signs, methods of diagnosis and treatment options.

A treatment center built exclusively for radioiodine treatment of cats with hyperthyroidism.

Centers for the treatment of feline hyperthyroidism. Discusses services and philosophy, the different ways of treatment, hospital locations and phone numbers.

A Long Island, New York based center dedicated to the treatment of cats with feline hyperthyroidism, using I-131.

A southern California based veterinary facility providing diagnostic nuclear medicine and magnetic resonance imaging for animals as well as radioiodine therapy for feline hyperthyroidism.