So sorry to hear about this tragedy Mark. Just catching up on the forum and came upon this post and had to relive some sad moments we experienced here just about a year ago. My son was home and responsible for closing up the coop and mistakenly missed hooking the latch completely.
Long story short, it was a gruesome discovery in the AM. All of my standards were destroyed, including my beloved CB, a WC Black Polish rooster, whose picture we would later find out was published in Storey's Illustrated Guide to Poultry Breeds. They happened to be photographing for this book while my son was showing at the New England Poultry show and his picture was chosen to be used. It was nice to see him in print, but brought back lots of sadness and anger. We have recently replenished our flock, the two little banty show birds just weren't pumping out quite enough eggs

And just yesterday, I was able to get a show quality bantam WC Black Polish! Yeah! Sorry, got side tracked (I'm a little excited about Rocky). Whatever got my hens that night was merciless. Only two were dragged off and destroyed, CB and one other hen, the others just killed and left. Maybe coon, maybe fisher?!?!
About 2 months ago, my kids' tree fort where I store my feed in metal cans, was raided and about 25 lbs of food eaten in one night. Some neighbors also think bear around here...but, not sure. HUGE pile of "stuff" left behind, apparently whatever it was was not house broken. Luckily my birds were buttoned up tight that night, but I always am extremely anxious on my morning walk to let them out. You just never know.
Hope things are looking up for you Mark. My heart goes out to you!