Satisfy your dog's natural instincts to chew and appeal to their instinct of smell and taste with BarkBone? Natural Instincts Wishbone Allergen-free Peanut Butter flavor durable, long-lasting nylon chews. Infused to the core, the BarkBone Natural Instincts Wishbone invites play and therapeutic chewing and is designed with a natural and organic shape that is easy for dogs to hold with full-length legs and a generous middle. Available in three sizes: Small, Medium, and Large. Our chews are non-toxic and non-allergenic and are proudly made in the USA!