The Kaytee Knot Nibbler is a ball of fun for small animals. Pets will nibble and gnaw this wooden chew toy to reach a fun wooden ball on the inside! Knot Nibbler is made from all natural wood and safe vegatable food colors, making it a perfect chew toy for rabbits, guinea pigs, hamsters, gerbils, chinchillas, pet rats, and other critters! Toys no longer contain nuts.