TexasBred
Well-known member
Better check those products as they all have different active ingredients. Active ingredient in Heartguard is Ivomectrin. As for the cat/dog going different places, the diatomaceous earth goes with them also. Helps to put it in their bedding and lounging areas as well. I treated my entire lawn one time with the DE and use the Frontline on the dogs and cat and haven't seen a flea or tick now in years.