There is no run, and no fencing at all...A road and woods separate our property from anyone else's...Here is my deal...The chickens treat the road like a fence...they go up and pick through the ditches, but always stay 3 or 4 feet away. They don't leave our property, or even come close...we have 4 acres and they have traversed perhaps 100 feet from the coop...we only have 12 chickens right now, so here is my question when I have a lot more than 12 can I still let them free range, or will I need to put up some sort of fence...I don't want to be the neighbor with the wild chickens running all over the place...so what makes a chicken stay close to home? Is it just that they have to like their coop and know there is food there? I want a rather large flock of maybe 50 chickens or so...so will 50 chickens scatter, or will they stay by the house the way the current chickens do? Or is it subjective on the type of chicken?