A tasty treat that provides the salt and trace minerals that small animals need to maintain good health. Formulated for rabbits, hamsters, guinea pigs, ferrets, and chinchillas. Appropriate for free-choice feeding (animals will consume only what they need). Spool is 2 inch in diameter by 1 inch thick. Can be hung inside the hutch with the Pet Lodge Spool Hanger (Item No. SSH1, sold separately).