Nylabone Durachew Ring Original Flavor Giant Intended for use by powerful chewers. Be sure to get the right chew and size for your dogs particular chewing style. Bristles raised during chewing help clean the teeth and this cleaning action helps control plaque and tartar buildup. Technical Details Intended for use by powerful chewers. Be sure to get the right chew and size for your dog s particular chewing style. Bristles raised during chewing help clean the teeth and this cleaning action helps control plaque and tartar buildup..