I coop my 11 hens at night (they go in the coop on their own) In the day they have a fenced in run, well over 100 square feet...which they have scratched to death... here is the layout of my land. I live in Muskoka in Ontario Canada and I have 2 acres in the middle of over 40 acres of open fields and bush. Lots of foxes, dogs, and other wild animals in the bush. I let my chickens out of the run so they can go get fresh grass etc...but the little stinkers head straight into the bush...it is very frustrating...because I don't want to worry about them...but I do. I am expanding my coop and getting 13 more birds in July...and I am making a second run on the other side of the coop (which is 150square feet) so I can let the one side grow back and then just alternate them. My girls went to a farm today with friends and they have 75 chickens and just let them wander all over...am I just too concerned?