Frontline is not a bad product. It sometimes doesn't work as well as some others for ticks and all flea/tick products will probably become less effective overtime.
Advantix should not be used if a cat is going to come near a treated dog. So that isn't an okay option for a lot of owners. Permethrin also has a somewhat high reaction rate, so that's another reason it does not work for all dogs.
__________________ Crystal , Ellie May (RIP) , Rylee Finnegan , and Gracie Boo🐶 |