Give your small pet an interactive way to get his essential minerals with Penn-Plax Donut Small Pet Mineral Blocks! These mineral blocks are packed with calcium and other minerals that are essential to the diets of small pets like hamsters， gerbils， guinea pigs， ferrets， rabbits， mice， and even some birds. Mixed with tasty corn flour， beetroot powder， and sweet potato powder， these tough mineral blocks are intended for supplemental use and should not be consumed by humans. Your little pal can enjoy the benefits of shaving down his teeth whenever he gnaws on them as well. Simply serve as directed to help give your little buddy a balanced diet!