I've been using frontline plus on the kitten since the day we brought him inside and on the dogs I've been using it for atleast a year. Anyway today I notice fleas on the kitten . Well I'm guessing it's a flea it's burrowing through his fur but it's not jumping. Well Elwoods been itching lately so I check him and sure enough I notice a couple of the same bugs on him! So now I have to treat all the carpets and dogs and cats with a shampoo and then reapply the frontline I guess. How can they get fleas if they have been on frontline for this long? I follow the directions and they don't get baths/go swimming for a couple days before/following the treatment.