We have 2 dogs and we noticed our dogs were getting fleas on them even after we gave them baths. We knew that they were having to be getting them from the small yard they go out to from their dogdoor to use the bathroom. We already had Suspend SC for other uses and then I called customer service and ask the lady what I needed to go with the Suspend SC to kills off the 3 cycles that they grow into to kill off all the fleas. She told me to buy Tekko Pro Insect Growth Regulator and add it to the Suspend SC that we already had. You do have to be ready to take control of theses fleas and do spray a few times. Both of these products are also safe to use in the home also. Buy both of these products. Suspend SC are for the adult fleas. Tekko Pro Pro Insect Growth Regulator will kill all of the lavae and eggs that the adult fleas lay. BUY THIS!!!!! YOU WON'T BE DISAPPOINTED!!!!!