Fleas are one of the most common parasites caught by pets. They are not just an inconvenience their saliva is considered one of the most allergenic substances on earth and is the cause of a nasty skin disease in pets called Flea Allergic Dermatitis (FAD). That's not to mention the embarrassment of having your home infested with fleas and the discomfort if you're bitten as well. So start protecting your pets and home with "Nature Guard" Herbal Flea Drops that repels fleas for up to 4 weeks. Suitable for dogs and puppies over 8 weeks of age.