Oxbow?s hearty, hand-selected Oat Hay is a favorite of many rabbits, guinea pigs, and chinchillas.ÿ Our Oat Hay is harvested before the oat develops into a seed, providing savory husks full of flavor and fiber.ÿ Its aroma will stimulate your pet?s appetite and encourage him eat more hay.ÿ Your pet should have unlimited grass hay every day.