I am using frontline because my dust is jumping when I hoover!!! Afraid I was rather lax due to having a touchy dog.  I have to be quick to put in on my dog because she is such a drama queen you would think I was trying to do something really harmful to her.  At least I can put it on her now.  So we have made progress although it is closing the door after the horse has bolted I fear.
Quesion 1.  I am worried that not enough is getting on her skin how do I know?
2.  What is the best thing to do with my carpets?  Do I just keep hoovering and hope the frontline kills them as they jump on for a feed?  I don't want to put stuff on the carpet with my young grandchildren on the floor.  Would be grateful for advice please.

You need to spray everywhere in the house where the dog's been with something like Indorex, up to a level of about a metre. Take the grandchildren out for the day, then they'll be all right.

Thanks Jg.  That is just about everywhere I am afraid.