I live only 10 mins from town, but in a fairly wooded area. I have been concerned about foxes, raccoons, and possum (even though I haven't seen any lately) I have been slowly building up our run for our chickens, first with a larger heavier gauge wire, and then with finer wire (hardware cloth?) along the bottom. Along with 2x4's around the bottom for extra security. I have been letting out my chickens who are 8 and 6 weeks old while I am outside or in view ( thier coop can be seen from my kitchen window) and they are fairly close to the house (easy access). Then yesterday while out with my chickens giving them treats, I saw for the second time a juvenile bald eagle! Last year we had a pair of ospreys hanging out in our backyard, this year an eagle! So we started to put up some plain chicken wire over the top of the run yesterday as a precation until we get a roof on it, but we were a few feet short . Am I being to cautious? Will an eagle or osprey take a chicken for lunch? I still will not leave with all my chickens out because of the gap in the top of the run. Who knew you could have all these critters so close to town!