Great Dog Monster Antler Chew - Best for Dogs 65+ lbs. (Sourced & Made in USA) circumferencGreat Dog Monster Antler Chews are 8.5-10" long, 6.5-8" in circumference, approximately 1 pound and best for dogs over 65 lbs Sourced from Colorado, Montana, Wyoming and Idaho, elk antlers are long lasting, even for the toughest, most aggressive chewers Antlers provide 40 essential minerals, amino acids and other nutrients including calcium, zinc, manganese and potassium while helping to reduce the tartar build up on your pet's teeth Much less likely to chip or splinter than other types of bones when chewed A renewable resource--antlers grow back every year and are naturally shed