Last night I was about an hour late locking the coop. All the bigger chickens where on their roosts but I had two younger chickens that were in the habit of roostering under the coop, requiring me to put them in every night. The run they were in is a solid 6 foot fence with a four foot gate. They also have a big, albeit lazy dog just outside the run. A big picture window faces the coop and is about 5 feet away the lights were on and people were on the other side. I went out and found the chicks missing and searched all over with a flashlight without luck. The next morning I found the body of one, uninjured except it was missing its head, (I will spare you a photo) on the other side of fence where the dog was, maybe two feet away the other chick was long gone and probably eaten. Once before when I was late, like 20 minutes after dark something grabbed a half grown chick. That time I heard something rapidly running away. I live in suburbia but we coyotes, foxes, loose dogs/cats, owls and opposums. There is also some kind of rat, it looks cleaner and smaller than a city rat with a long tail. What's bothering me is something is lurking about and grabs a chick every single time I'm just a little late locking them in. The first time I was late was months ago. What is so fearless and sneaky it will go around/near a dog and have people that could see them if they looked through the window, but of course no one did and be able to take off with two sturdy chicks unnoticed? Oh, there were deep scratch marks in the ground facing the fence which could of been my dogs, but not likely, and no mess or loose feathers or sign of struggle. All the other chickens were very calm. I'm real puzzled. I need to know what it is so I can take measures to stop them. (electric wire around the fence will stop climbers but not owls) I guess the 3 clues to the identity are (1) Very Bold (2) Always lurking about, (we do back to woods) (3) eats head off but leaves body alone. Thanks for any suggestions or guesses or similar problem.