Nutritional Management of Feline Hyperthyroidism

Hyperthyroidism is recognised as the most common endocrinopathy of older cats, however, despite worldwide occurrence, the pathogenesis of feline hyperthyroidism remains unclear. A number of epidemiologic studies have identified risk factors, however; as yet, none have been shown to cause hyperthyroidism. Traditional methods of managing feline hyperthyroidism include thyroidectomy, anti-thyroid medications, and radioactive iodine. Surgery and radioactive iodine are designed to provide permanent solutions whilst oral and transdermal anti-thyroid drugs are used to control hyperthyroidism, and must be given daily to achieve and maintain their effect. A fourth management option is now available for hyperthyroid cats in Australia; Hill’s Prescription DietTM y/dTM (abbreviated to y/dTM).