I've had my 4 hens for over a year, and they free range sometimes all day. They are not fenced in, and until recently stayed in our small woods in our back yard, and not too far from their coop. In the last couple of months, they have gotten very bold, and ventured to our front yard, and even in the ditch by our mailbox next to the semi-busy road. I've heard chickens don't venture into roads, but not sure I trust that. I don't want to have to build a fence... we have a chicken tractor and it moves all over the place... a fence is impractical. Plus the cost. Any suggestions??