Happydog you can get raid from alot of supermarkets or savers, but get the red can, and you can get 4fleas from pets at home and prob pet shops, just buy it over the counter, apparently you can use it with frontline,. with the raid, i spray a room close it up and leave for an hour or so, i spray round my furniture and the base of the beds too then open the windows after i go back in, i have 3 dogs and 2 cats and rarely have a problem with fleas , if you spray carpets obviously do a test first to make sure it doesnt stain but ive never had a problem ,its about £2.20 ish a tin , hope this helps