I think it was a fox or coyote. It might have been a raccoon too, if it was a coon it should be easy to find the body, it should not have been dragged to far, just follow the feathers, look for out of place little clumps of feathers, coons like to hide their kills under stuff.
Last winter my favorite hen got killed by a raccoon, when I cam outside I found this in front of my coop on the driveway
It was pretty clear a bird was killed last night, these are definitely not molted feathers.
I walked around the coop to see if I could find any more feathers, I found this on the other side of the coop near the woods.
3 feathers stuck to a stick does not seem very weird but if you think about it, why would a chicken ever drop 3 feathers in the exact same spot?
A few feet from this I found more feathers,
and then more
And this trail led me to my other chicken coop which is lifted off the ground, under that coop was the body.
If it was a raccoon you should be able to find the bodies if you look around close enough. If it was a fox or coyote you will probably never find them