Newts Chews Antlers are 100-percent Naturally Shed in the USA. This renewable resource is rich in calcium and minerals. Our Antlers are free of all inonorganic materials such as plastic polymers and chemicals that make up most commercial dog chews. Newts Chews Deer Antlers are SORTED BY WEIGHT. You may find there are fun assortments of shapes and lengths that will keep your best friend interested. Size : Small Antler 1-2.5 oz, Medium Antler 2.5-4oz, Large Antler 4-8oz.