Yes, coyotes woyld be a problem. And yes your peas would probably go into the woods to explore and roost in the trees. I think there is a thread here on free ranging...Zazouse and a couple others here do it, so talk to them. I know Zaz has dogs to protect her flock. I think others free range during the day and pen them at night....they herd them back in So you could train them to do that.