I have never had this problem. My chickens will not go back inside after being in the yard on free range. Every group of chickens that I have ever had would just go back to their roost at sundown, and all I had to do was to go out and shut them in. Not this bunch. I have to go out at sundown and drive them in, and that's a job. It takes two of us. I turn on the light inside and everything. Any ideas before I butcher the whole lot and start all over?