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. Available in a variety of shapes, sizes, and colours, Nibblers are made of a range all-natural materials such as wood, loofah, willow, corn husk and raffia. All Nibblers are colour-finished using non-toxic food colorants. Some Nibblers come with a chrome-plated steel rod attachment that can be either hung or fastened to the cage.