Sweet P's all natural elk antler chews come from the Rocky Mountains from an annual renewable crop. Every year elk naturally molt their antlers. Our antlers are from elk that are never given steriods, unnecessary antibiotics, or any other growth chemicals. Being that antlers are exposed to the weather, they are stronger than raw bones and are of finer texture. Antler chews are a great natural source of calcium, phosphorus, potassium, sodium, magnesium, iron and zinc. Antler chews will not easily break, chip or splinter. They are long lasting and safer for your pet. Always use caution when first introducing an antler chew to your dog. It is important that you select a chew that is proportionate to your dog's size.