When you get them killed,,,,,,,,,I would suggest that you do not put dogs in them for at least three weeks.....In 14 days after you kill them all of those unhatched eggs are going to start hatching and you will have to kill those fleas too....And then one more cycle of eggs after that.
good luck...

Go online and order Flea Assassin pills. Red label ones kill fleas within 10mins. Green label ones stop their breeding cycles. Order the highest pound. Give the green label ones the day after the reds. Give the pills every 25/30 days. This is what we’ve been using for couple years now and it’s working fine. Even gave it to puppies. And with 60 plus dogs it’s cost effective also.

You need to go see wormy. braveto its expensive but it is great, buy the biggest pill and cut it in half.

My research shows this is a medication that needs a Rx by a vet. If you have a web-site that does not require this, would you please post it?