Be careful with the woods around. I have 2 clear acres surrounded by 35 acres of woods. My entire flock free ranged ALL day with no issues for 6 months. They went to the neighbors yard, a nearby cornfield, in the woods, etc. No issue until 2 days after the rooster learned to crow. Since then we would have 1 or 2 picked off and not sure by what. They would disappear with no trace of feathers or anything. Finally 2 more just vanished in the same day. Since then I stopped free ranging them for about 4 months. I started letting them out once every few weeks near the end of the day so they wouldn't go far and would only be out for a couple hours before returning to the coop. We had a really nice day 2 weeks ago and I really wanted to let them out, so I did. I saw a fox on the opposite side of the house when I looked out the window. I went to check on the chickens and there were literally piles of feathers everywhere and no chickens in sight - mind you I had almost 30 of them. I spent 2 hours looking everywhere and found about half the flock scattered in very good hiding places. 1 of my 2 roosters was severely injured, I think the fox possibly broke his neck. I returned those I found to the coop and left the gate open and a few more returned that evening. In total, the fox got 3 (no bodies left, but I recognized what piles of feathers belong to which missing chickens), one died two days later I guess from shock because she seemed fine after the attack. I thought I would have to kill the rooster, his head would only drag on the ground. He could move everything except his neck. He has surprisingly recovered nicely and should be ready to go back with the flock, he now eats, drinks and stands with his head up, he just has a little crooked neck. Prior to this event I had a raccoon breach a whole in the coop run that I was unaware of and massacre 3 baby chickens. I put the 4th baby chicken in a cage in the garage and another raccoon got in the garage and tore the cage apart to get her.
I wrote this long story to say just be careful. You spend the time, effort and money to raise your chickens and get the m to the point where they are finally laying eggs only to have them stripped by a fox, raccoon, hawk, eagle, whatever. Until the last fox and raccoon attacks, I had not seen any predators for the over a years time I have had the chickens, but they eventually came. You may not see them, but once they discover the chickens they won't go away. The fox came back 2 days later and he did get to meet a couple of .22 longs. 2 raccoons met them too.