DING!! DING!! DING!! I KNOW THE ANSWER TO THIS QUESTION!!!
http://www.fleabusters.com
when we moved into this house 7 years ago, it turned out the place was **infested** with fleas - the previous owners had two HUGE dogs and had tried everything to control the fleas.
within days of moving in, my wife's legs were being chewed to pieces, our two cats were scratching themselves so badly they were bleeding. our dog was going insane.
we had the carpets professionally cleaned. it dented the problem, but in <1 week, the fleas were back with a vengeance... they were just **cleaner** from the carpet shampooing
so we thought, why not call
http://www.fleabusters.com again? they had taken care of our previous house and we never EVER had a problem again.
we did, they came out 3 days later, did their bit - 13k sf yard, 18 fruit trees and 2800 sf house - and ... problem solved **again**.
that was 7 yrs ago next month and we've never EVER had the problem - even *one* flea on our 2 cats or 2 dogs.
i would call them ab-so-lute-ly without hesitation!
good luck.
(edit: we do not use any other type of flea/pesticide on our property, period. we bathe our dogs maybe 1x per year and 1x every 4 yrs for the cats.)