We live in predator country - bears, cougars, fox, bobcats, coyotes, raccoons, eagles, hawks - you name it. As soon as I let my girls out to free range, our neighbourhood eagle starts circling. What we did was give them a predator proof coop and run, 250sq.ft - it's like Fort Knox, probably only a bear could pull it down. Then we are adding an additional 350sq. ft just outside the run for them to roam in. It is fenced, has electric wire, and will be covered with bird netting. The plan is to only let them out there in daylight hours, back in their run as soon as it starts getting dark and then locked up in their coop when it gets dark. We had a bobcat shmoozing around for a few days, but we scared her off a couple of times and have never seen her back or seen any sign of her. She was a bold little thing too. We also have ducks and a drake. He will often give the alarm call if something flies overhead and the ducks AND chickens all run into their houses.