Pet Qwerks Flavorit Mint Wood Nylon Dog Chew in Medium size. The Natural Instincts Flavorit Wood Nylon Chews are infused to the core with irresistible mint flavor that releases as your dog chews. This classic bone shape nylon chew is made from REAL wood and is ideal for moderate chewers. The curved design makes for easy pick up and features patented flavor cells that can be filled with your dog's favorite spreadable treats like peanut butter for long-lasting chew sessions. Good for dogs up to 50 lbs.