Hay for rabbits, guinea pigs & similar small animals is plant material which is dried after a meadow has been cut and can thus be preserved. Straw, on the other hand, consists of straws of threshed grain. Compared with the same amount of fresh grass, hay is richer in energy and is a basic raw food for the healthy nutrition of small animals. Preserving grass in this way makes it possible to provide the nutrients of a natural meadow even in winter. Mountain meadow hay is considered to be of particularly high quality: the higher the biodiversity of a meadow, the richer the nutrient content of the hay. Ideally, good hay for small animals should contain several types of sweet grass, legumes (such as alfalfa and some species of clover) as well as many different herbs and flowers. For the nutritional composition of the hay, this means that crude fibre, crude protein, calcium and phosphorus are contained, with the percentage varying according to the origin of the origin of the plants.