Does hartz guard plus shampoo for dogs kill head lice?

Hartz Guard Plus shampoo for dogs is primarily designed to treat fleas and ticks, not head lice. While it may have some insecticidal properties, it is not specifically formulated for lice treatment. If you're dealing with head lice, it's best to use products that are specifically designed for that purpose, as those will be more effective and safe for humans. Always consult with a veterinarian or healthcare professional for the best treatment options.