What would only kill and eat one chicken?

The automatic door to my chicken coop didn’t close last night (we were not aware). Today we found a body of one of our hens, something had killed and eaten her. Part of her head and it looks like something took a big chunk out of her body.

Any other time we’ve had a predator get any they’ve killed all or at least a good portion of the girls. Raccoons have gotten in before and killed as many as they can, but they always eat the heads and leave the rest. A fox has gotten some before but they always take them, leaving like no trace behind.

Any ideas? I’m thinking maybe a bobcat or something? I just can’t think of what would kill and actually eat only one chicken.