Revolution is a pretty safe product and I have yet to see ANY parasite survive a dose of the stuff.
You should also be vaccuming a LOT, but the revolution is so effective because it kills them and lasts 30 days. The fleas will still hatch, but when they bite, they all die. It's crazy. I've seen it in a few hours where they were dosed and then all of a sudden, the fleas were all dead. |