All our 5 pets go out of doors. THey certainly have fleas and we will never make them flea free until all the wild birds, squirrels, rabbits, 'dillos, deer, panthers, bobcats, and neighbor or feral dogs and cats are dead. (Animals are fenced but we walk them outside the fence and all but dogs and ? deer can get in our fence.) We treat them with frontline or revolution to cut down on ticks and fleas for their comfort and ours, but to keep fleas off us we let the animals back in the house before we go in if we leave town and kennel them!!!
That said DH is covered with flea bites (he thinks) this week, first time in his life. I have none, we share a bed, cats sleep on it but more on my side... He forgot to change the sheets as advised (and I'm refusing to baby him so I haven't done it either) but number of bites is already decreasing- none last night.
We do keep borax down behind furniture sinks etc but that's to keep down roach popualtion.