Living World Nibblers Willow Chew Balls contain 3 colourful ball-shaped willow chew balls. 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.