An essential part of all Rabbit and Guinea Pig diets, Showmaster Pet Oaten Hay helps to prevent teeth from becoming overgrown while providing a high fibre diet that supports a healthy digestive system. While Oaten Hay should make up a large part of a rabbit or guinea pigs diet it should always be fed in addition to nutrient rich foods such as Showmaster Rabbit & Guinea Pig Pellets or Mix. Australian Made and Owned. Hay should form the bulk of your rabbit's or Guinea pig's diet. They need to eat hay in the early morning and late evening to help move food through the digestive tract at the proper rate. Also, chewing hay will aid in keeping the ever-growing teeth of your cavy or rabbit in check. Supplement with other standard feed for rabbits and Guinea pigs. May be used for bedding, too.