Great Dog Large Elk Antler Chew - Best for Dogs between 30-80 lbs. (Sourced & Made in USA) Great Dog Large Elk Antler Chews are approximately 5.5-6.5" long, 4.5-6.0" in circumference and best for dogs between 30-80 lbs. Sourced from Colorado, Montana, Wyoming and Idaho, elk antlers are long lasting, even for the toughest, most aggressive chewers Great Dog Elk Antler Chews 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 Elk Antler Chews are 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