At data shows that 1 out of 3 cats suffer from kidney problems in his lifetime, and while cats of any age can be diagnosed with kidney problems, it is more commonly seen in older cats. It is also common for senior cats to develop other age-related conditions such as reduced mobility or cognitive dysfunction. cats hide their pain very well, so well, that parents may not recognize the signs of a joint problem. The signs include spatial disorientation; wandering away from home into unfamiliar territory; lack of interest in playing; excessive sleeping; altered cycles of sleep and wakefulness; long periods of staring blankly into space or at walls; indifference to food and water; urinating and defecating outside the litter box; and seemingly unprompted episodes of loud vocalizing, frequently in the middle of the night. That is why Hill’s nutritionists and veterinarians developed new Prescription Diet®k/d®+Mobility for cats. This clinical nutrition not only supports your cat's kidney function but also helps to improve his mobility and increase his cognitive alertness and vitality. In fact, the nutrition of k/d is clinically tested to improve & lengthen quality of life. This is a chicken flavored dry cat food.