Hartz® Natural Small Dogs Rawhide Chew Munchy Sticks. Less than 20 lbs. Hartz® quality since 1926. All natural; no preservatives. Satisfies your dog's instinctive urge to chew, which reduces plaque and tartar. Provides long-lasting chewing enjoyment. Treated by irradiation. Visit our website www.hartz.com. Hartz® and other trademarks are trademarks of The Hartz Mountain Corporation.