For small critters such as pet mice, rats, hamsters, ferrets, squirrels, guinea pigs, chinchillas, hedgehogs and gerbils (Not For Dogs Or Cats). Antlers dropped in the wild have been chewed on by these critters since the dawn of time. Provides essential minerals and calcium including Lipids, Collagen, Glucosamine, Iron, Potassium, Phosphorus and Magnesium which help to support the overall health and wellbeing of your critter. They also help to support overall bone, coat, teeth and muscle health. No preservatives or chemicals. They are non-allergenic and have no odor. No animals harmed in the harvesting of these antlers.