NURSER BOTTLE - This bottle was designed to promote the natural feeding of Esbilac, KMR, Goat's Milk KMR, Goat's Milk Esbilac, PetLac, or other liquids to small animals. PROMOTES NATURAL FEEDING - Our flexible, latex-free nipples simulate the milking action of a mother's nipple, which develops facial muscles and stimulates the normal flow of saliva. Bottle feeding also allows the animal to refuse formula when full. EASY TO USE - Marked with gradations, the included bottle makes monitoring food intake easier and helps prevent over or under feeding.If animal is too small or weak to nurse, consult your veterinarian.