I'm brand new to BYC and chicken keeping, so any advice will be welcome. Our chickens are free range on several fenced acres. The whole yard is fenced with a 5ft fence except for the end of our drive. Every morning around the same time a couple of our chickens try to go outside the fence and into the road. I can usually keep an eye on them and chase them away from the drive, but it is kind of a pain. Is there any way to train them to just stay away?