Four Paws Pet Nurser has been scientifically designed by veterinarians and professional breeders for all pet feeding: puppies, kittens, hamsters, gerbils, monkeys and many other pets. Designed for all pet feeding Veterinarian designed and approved For puppies, kittens, hamsters, gerbils, monkeys and more Kit contains: 1-Pet Nurser bottle, 2-replacement nipples and 1-bottle brush.