The new product, Certifect, may work. It's..fipronil and amitraz. I wouldn't be a fan of using amitraz on my dogs though. Frontline not working at all? 3D already has permethrin in it, so Advantix will likely not work either.
__________________ Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶 |