Hill's Prescription Diet - Dry Cat Food - Feline k/d Early Stage Kidney Care - 4LBS1 out of 3 cats may develop kidney disease in their lifetime. This disease can be difficult to spot in cats, as signs may not be clearly visible until 75% of kidney function is lost. However, a new test can now detect kidney disease months and even years earlier, when as little as 25% of kidney function is lost. Kidney disease is more common at advanced age, but with early detection & intervention, kidney disease can be stabilized. If your cat's age