For the fourth time in about a month or so, one of my chicks has been eaten by something! The victims all tend to be around six to ten weeks old. Please help me ID the culprit!

There were feathers strewn about everywhere.

More feathers and some blood. Looks like whatever got him cornered him in the dog crate I had lying around.

This is where it starts to get graphic. There's really nothing left but some feathers and bone.

I know it's gross, but I had to get a good shot of the body. Don't worry, I wore gloves and cleaned up afterwards. You can see that there's nothing left but bone. One wing is is the only limb missing and the head is still intact. I'm not sure what could strip it down to the bone in one night. Whatever's doing it must be starving!
There was also another chick dead in the coop. His neck appeared to be broken, and no part of him was eaten. The adult chickens weren't targeted, which is strange because they're all bantams and just barely bigger than these chicks. The poor guys were eaten right in the coop, no one was moved.
I appreciate any help you guys might give me, and apologize if anyone was offended by the photos.
There were feathers strewn about everywhere.
More feathers and some blood. Looks like whatever got him cornered him in the dog crate I had lying around.

This is where it starts to get graphic. There's really nothing left but some feathers and bone.
I know it's gross, but I had to get a good shot of the body. Don't worry, I wore gloves and cleaned up afterwards. You can see that there's nothing left but bone. One wing is is the only limb missing and the head is still intact. I'm not sure what could strip it down to the bone in one night. Whatever's doing it must be starving!
There was also another chick dead in the coop. His neck appeared to be broken, and no part of him was eaten. The adult chickens weren't targeted, which is strange because they're all bantams and just barely bigger than these chicks. The poor guys were eaten right in the coop, no one was moved.
I appreciate any help you guys might give me, and apologize if anyone was offended by the photos.