Help - we are having a flea/tick problem at our place here in the country. I have 10 hens that free-range during the day and are cooped at night. We have two dogs and they have been on flea/tick protection from the vet that is just NOT doing much good. They are both taking an internal flea/tick/wormer. One of them is also receiving the medicine that you put on their shoulders. We REALLY need to treat our acre fenced yard where the chickens and dogs usually stay. What can we use on the yard, if anything, that I don't have to worry about the chickens ingesting? I imagine I will have to treat them, too, maybe with Sevin or something as well as the coop. If I CAN treat the yard, how long before I can let the chickens out to graze again? Any ideas out there?