Kitten Milk Replacer (KMR) is vital for newborn kittens who are orphaned, rejected, or need supplemental feeding, providing a nutritionally balanced formula that supports their early growth and development. It includes essential proteins, fats, vitamins, minerals, and taurine, specifically designed to replicate mother's milk. KMR is crucial until kittens are ready to transition to solid food at around 4 to 6 weeks of age, ensuring they receive the necessary nutrients for a healthy start in life.