I am being overrun with mosquitoes and fleas. I have bug-bombed my house, but I REALLY need to spray my yard. If I use a pesticide, how long before I can let the girls outside again. Two days? a week? a month? Yes, I have swallows, woodpeckers and the girls help, but there are so many they can't control them all. I have to do something before we all come down with WNV. Any recommendations?