Hill's Prescription Diet k/d + Mobility is a veterinary dry food for adult cats managing both chronic kidney disease and joint issues simultaneously. It requires a veterinary prescription and is designed for cats where two conditions need to be addressed through a single diet rather than two separate foods.

The formula combines controlled phosphorus and low sodium to reduce the workload on compromised kidneys, with Hill's ActivBiome+ Kidney Defense — a prebiotic blend shown to support kidney function through gut microbiome activity. Joint support comes from ingredients that help maintain mobility and reduce stiffness in cats with reduced movement or discomfort. Developed by Hill's veterinary nutritionists.

It's the dual-condition management that makes this diet genuinely useful — cats with kidney disease frequently develop mobility problems as they age, and having a clinically formulated food that addresses both conditions means one less variable to manage at home.