Something has been killing off my birds (call ducks & cochins) constantly! I thought my pens were secure but I guess not. Something is climbing up & grabbing legs/wings from the bottom wire floors and eating them up. No blood or feathers in the nest box. Here are pics of the pens and the latest crime scene. It ate 7 juveniles in one sitting. Any ideas as to what it is?
The pen:




















The pen: