your precious pup will need a couple of days up to ten for those pills to work in full. The pill will kill and larvae already laid by fleas in here pelt when they hatch. The ones on her that are live and bothering her will be dead in 24 hours. Its the unborn that will take a little time.
Once that is accomplished you will have a very happy companion who will always be happy to see you!
Best of luck to your pooch and you as well kind sir.
Best to you both,
micro....