I have a flock of 11 adults and until yesterday 10 eight week old littles. I live in suburban setting in Maryland on about 1/3 acre lot. We have a 12x12 completely enclosed, predator-proof coop/run up against our house. When we got the new chicks, we added an uncovered run with 4ft welded wire as the fence with about 4 feet of netting added vertically to the top of the fence because a couple of the littles were trying to fly out of the run. About 12x27 of it is completely open, with the exception of a large River Birch tree, and about 12x19 is under our deck. Since the chicks were 5 weeks old, all the chickens have had morning to evening (about 7am-5pm) access to the entire area. Before the little chicks arrived, the adults free ranged pretty much everyday for several hours in the afternoon to roost time. In the 3 years of having chickens, we have on occasion had hawks fly pretty low through our yard. But never an actual incident. Until yesterday. Around 10 am, a hawk came into the run and got tangled a little in the netting when my daughter went out to chase it away. One of the littles died. She had no visible injuries, so I don't know if she died of fright or if she ran into something. So, we now must cover the run. They love being out there, and they do need the room. Since the area is relatively small, should we cover it with the welded wire with 2x4 openings that we used as the fence or some kind of netting. What is the most secure but with an open feel. The other side, to the right not visible in the picture, has a roof so it isn't as open feeling. I have read so many different things here but the situations are usually for much bigger areas that what I am dealing with here. Our chickens are basically pets and we go out and "play" with them everyday, so every loss is greatly felt. We really don't handle any losses well. Also, we have 4 dogs that go in and out all day but that didn't seem to deter this hawk. Thanks for any help! As an aside, I followed the recommendations from the group on having the chicks in separate enclosure in with the adults and the transition to having them one flock has gone so well. There haven't been any real issues, except for this darn hawk!