This spot-on flea treatment has been formulated for puppies and dogs that weigh up to 4kg. It effectively kills fleas and does it fast!It provides relief from flea bites in around 3-5 minutes. It does not require your dog to be bitten to be effective - it kills on contact.This will result in less bites and Flea Allergy Dermatitis. Advantage flea treatment 6 pack gives you a 6 months supply for one dog. It's also completely safe to use on pregnant or lactating bitches.An effective way to kill fleasAfter contact it kills adult fleas and larvae within 20 minutes.A single dosage lasts for the entire month and is simple to apply - just squeeze on the back of your dog's neck.Waterproof - It remains effective even after exposure to rain or bathing.Works well and is completely safe for dogs.