Hartz® Ultra Guard® Rid Flea & Tick® Shampoo For Cats. Kills fleas, ticks. Fresh scent. Hartz® UltraGuard® Rid Flea & Tick® shampoo for cats. Hartz® and other trademarks are trademarks of The Hartz Mountain Corporation. For more information, call our experts at 1-800-275-1414.