Mountain hay Little One is a naturally grown sundried grass. As hay is a major part of diet of all herbivorous pets (rabbits, guinea pigs, chinchillas, degus) it is necessary permanently provide hay to your pet. Hay Little One has a rich botanical diversity; it provides essential fiber necessary for dental health and proper digestion. Hay also can perfectly serve as bedding and entertainment, as your pets can burrow through and build nests out of it.