Scott, I've heard that brewers yeast added to moist food helps to keep most creepy crawlies at bay. You can get it at nearly any health food store. Ask for active brewers yeast in the powdered form.
Halo, while we do have fox and coyote both in our area, I'm highly doubtful this is the case for the following reasons:
1) Our dog Jasper! He's awesome at keeping four legged predators away, especially during daylight hours.
2) Jasper's reaction to the scene of the crime did not indicate a predator of mammalian origins. Meaning, he reacts differently to the scent of each type of predator we have out here. Be it dog, coon, fox, or coyote, his body posture and reaction is different for each. Jasper did not indicate that the attack came from any of those vectors.
3) The trail of feathers leading off from the sight of attack went straight as an arrow, up over a large pile of pine branches, and over several large rocks [each about the size of a VW Bug] before the trail petered out. No coyote, dog, coon or fox would waste the time and energy, with a 6 pound hen in their jaws, to go
over those obstacles. Nope, everything at the scene of the crime, coupled with Jasper's reaction, points to a large bird of prey.
When we tally up all of the number of times that we've lost a bird to predators, wild or domestic, and pit that against the number of trouble free days that we've allowed them to free range, the frequency of attacks is relatively very low. Of course, my knee jerk reaction is to confine them to their fenced in yard and try to wrap them in wool batting. They're miserable for the duration. Eventually, I come to my senses and return to my long practice of allowing them to be chickens. To be sure, they'll spend a few more days yet in confinement, in the hopes that the perpetrator will return to the scene of the crime and we can dispatch them forthwith.....
We're all going to face death someday. If our lives have been lived to the fullest each and every day, then it is not a life lived in vain, regardless of how long or short it may be. I'm pretty sure my chickens would agree with me.