Plus a romp between dogs and fox cub:
We have a local Mr. Fox who stops by regularly to check on the chickies. Our neighbor has often seen him staring in through the chainlink fence. (Probably concocting recipes for chicken Marengo or some such.)
Fortunately Charley the dog and wooden coops that shut up tight at night, not to mention the 6' sturdy fence, have been a deterrent.