Malisa from Gatesville, Tx writes,
How long does it take Bifen IT to kill fleas?
I sprayed yesterday and my dogs are covered again and I too get covered when I walk outside.
Bifen IT is not a contact kill product, it is a residual product that can take a few day to start killing the fleas or other insects that you are treating for. You need to give the product time to do what its designed for. If the infestation of fleas is extensive then you may treat again after 7-14 days. It is recommened to treat your dog, as well as treat the inside of your home. Continue to clean, wash and vaccum daily till the infestation is under control. Please take a few moments to review our Flea Treatment Guide for more information.
Answer last updated on: 06/14/2017