For the Nutritional Management of Pets with Kidney Disorders Kidney disorders have many possible causes and may result in numerous uncomfortable and even serious symptoms for your cat. The condition,, also called kidney or renal disease, can occur either suddenly or over time. Prescription Diet Feline k/d has been uniquely formulated to help manage cats with kidney disease. Kidney disease can result from other illness or changes in your cat's health, breed/hereditary tendencies and even nutritional factors. The signs of kidney disease remain difficult to detect until more than two-thirds of kidney function are lost. ONLY AVAILABLE IN AUSTRALIA - QLD, NSW, VIC AND ACT