When I went out to feed my chickens this morning around 7:00 I noticed one of the coop was broken. Something had broken into the nesting box area and all the young chickens were gone. 2 were lying there dead. It looked like they had broken necks. There was a pile of feathers from another one, all the rest (8) were missing. What is the most likely culprit?
Welcome to BYC - so sorry about what has happened.
Can you provide a bit more information (even better a couple of photos) about your setup so that we can get a better idea of how easy/difficult this sort of damage would be to do to the coop in question - that will help narrow the list of likely suspects. If photos aren't possible the information that will help get a better picture of things would be:
whether the coop sits within an enclosed are or outside of one
what sort of fencing, if any, is between potential predators and the area that was damaged
what, if any, sort of latch system was involved in the area that the damage and break in took place
whether there were any prints in the area and, if so, what they look like
how high off the ground the damaged area is and what sort of structure around it could provide something for the predator to stand or climb on to reach it
is there any sign of broken skin on the bodies that were still there - if so, what part(s) of the body is damaged
These are just some starter things to consider - anything else you can tell or show us will only help to get an idea of what likely happened.