I have 7 cats, all indoors, never had fleas before, noticed flea's while brushing. Treated with Hartz Advanced Flea & Tick Control. I combed out live flea after 3 days. How fast can I treat my cats again with other meds like advantage or Farnam Biospot.
I would wash the other product off your pets and wait 48 hrs before applying advantage or biospot.Good luck, vetcarerx vet team