Well, I can report that supervised free-ranging is not without risk. I was working in the yard this morning and decided I'd let the chickens out, right about 9:30 am. At about 10 am I had my back to the chickens and heard a huge commotion, whirled around and right there, less than 15' away from me was a coyote with my BA in it's mouth, shaking it. I yelled and ran at the thing and it stood its ground for what seemed like an eternity, but was probably only a second or so and by the time I closed the gap to about 6' it dropped the chicken and hopped the wall. It stood there on the opposite side of the wall and didn't leave until I sent the dog after it. Poor Jim is limping something awful, but we couldn't find any visible damage to her beyond the loss of a lot of feathers. I was so sad to see that she didn't make it onto the roost tonight; I found her in a nest box. I hope there's not something wrong inside.
I don't know if the coyote just didn't see me prior to the attack or just didn't care. Just thought I'd share.
My MIL had this happen to her only she wasn't outside with them. However, when she ran outside toward the coyote, it just stood there. At the time, she had 2 cockerels and 2 pullets - each cockerel took a pullet and ran in opposite directions, forcing the coyote to halt and make a decision about which way it wanted to go. It was enough time for her to run out there, but that coyote didn't budge until it saw her boxer mix. Then it took off and sailed over the field fencing. That same day she ended up moving her little coop and run to the backyard where it was more protected.
The coyotes woke my husband and I up around midnight last night - boy were they loud! Then my husband went outside with the pellet gun, which caused my ducks to start quacking up a storm. My jumbo Pekin sounds like a goose - she's sooo loud - it's just HONK! HONK! HONK! Between the coyotes, the pellet gun, and the ducks - I am pretty certain the neighbors won't be talking to us today. They are already not happy that we got any chickens, ducks, etc.
We do supervised free-ranging with our chickens. But, I do get worried sometimes with all the stories I hear about coyotes and hawks just snatching them right from under you. I have our yard split in half and the dogs get the other side. At night, I open the "in between" gate and let the dogs have the run of the entire yard when all the birds are in locked in their runs. Our dogs keep all the night predators out. In the morning, when they see me come out, they go into their half. They already know that during the day they can't be in the side with the chickens and ducks.