BarkBone? Natural Instincts Zombie Nylon Bones are scary good! This long-lasting durable chew is made from premium artisan nylon and has a unique, REAListic design with rounded ends and a full middle, this bone is easy for dogs to pick up and hole. REAL bacon and natural grain ingredients are infused to the core to satisfy even the toughest chewers. Chews are non-toxic and non-allergenic. All ingredients are sourced and chews are proudly made in the USA.