I am new to chickening - I got my first batch of girls 3 weeks ago. They stay in the garage at night and I put them in their predator proof run during the day. The entire time they are out there I have 2-3 hawks sitting on branches, screeching and watching them - ALL DAY LONG. My hope was that when they are grown I could let them free range in my fenced backyard during the day, but now I really don't see how that is going to be possible. How do people free range chickens? Are the hawks going to lose interest when they get bigger?
Predators are a constant danger when free ranging, and eventually birds will be lost.
I agree with @sourland. I have lost way too many birds in the past. Now my birds have nice large covered pens that I covered with good heavy duty netting, concrete under the gates and electric wires around the coops and pens. Every predator likes chicken. Once your birds are discovered predators will lurk looking for opportunities when you least expect it. Good luck and have fun with your flock...