Pet-Ag Milk Replacer Plus Liquid for Kittens, 32 fl. oz. Milk Replacer Plus for Kittens is an economical milk replacement formula that provides kittens with complete nutrition that is easy-to-digest and is a good match for mother's milk in protein, fat and carbohydrates. It is also fortified with key vitamins and minerals plus taurine, an essential amino acid required for proper eye and heart development.