Supreme Science Selective small animal food and hay is the widest range of veterinary recommended species-specific foods formulated to meet the nutritional needs of small animals. Science Selective Timothy Hay comes from the first cut of the year, fresh from the fields. It's harvested from carefully chosen Timothy grass that produces the largest, tastiest seed heads and is one of the best hays to feed rabbits. As it tastes great, our Timothy hay helps encourage your rabbit to forage through the stems and leaves and have a good chew or even play. As that's a way for them to express their natural behaviour, it also helps to keep them happy too.