It should do the job and kill all those nasty fleas but you may need to fog your house to get rid of the flea nest also. I went with Yettas Dad to take Yetta to the vet yesterday and he uses frontline and Yetta STILL has a flea on her now and then. She told him that there is probably a nest of them in his house somewhere and he'll need to fog it about 3 times, 10 days apart and then a 4th time to make certian they are gone. Of, coarse, you get the animals OUT of the house BEFORE you fog it.