Living World Nibblers - Willow Chews - Stick The Living World Nibblers Willow Chew Stick is a green stick-shaped willow chew stick. Living World Nibblers are specially designed chew toys that help improve your small pet's dental health. They are also fun to chew on and are an excellent boredom buster. Nibblers are made of a range of all-natural materials such as wood, loofah, willow, corn husk and raffia. All Nibblers are color-finished using non-toxic food colorants. 7 inch long.