after posting earlier i got to thinking and realised i have 4fleas for dogs but thankfully never had reason to use it, our dog has a johnsons garlic pill each day and i can say not a flea ever..I agrea that frontline is fantastic but i have only ever used for reptiles with mites.With kitten only being 6 weeks i was worried to use it so the 4fleas seems the way to go, being totaly safe at this age.I really dont want fleas in the house and the kitten will not be coming home until im sure they are gone.