I have about a half acre on my property. What I would like to do is let the chickens free range while I am at work (8am-5pm). I am worried about predators. I figure dogs and hawks would be a concern. I would fence the area with welded wire fencing. I was thinking about getting some of that plastic bird/deer netting, and covering most of the top to protect from hawks. Are there other predators to be concerned about during the day, that I would need even more protection from?