Follow up to the predator situation:
Day 1: 12 week old pullet missing. No remains on site. Just gone.
Day 3: Pile of dove feathers and a bloody but otherwise clean dove skull inside hoop coop. No other remains.
Day 5 (mid afternoon): Three dead doves inside hoop coop. One was just a neat pile of feathers with no other remains. One was eaten except for the head, which had all its feathers on it still. The third was missing some feathers from its back and had a small puncture wound, but had not been eaten. Apparently the predator enters via the chicken pop door, which is also how the doves get in there.
Day 5 (hour after sunset): Heard a brief squawking and some flapping from the back yard. Grabbed an LED headlamp and ran out to look. Found an adult chicken dying near the back gate, with only a small amount of blood and no obvious missing feathers. It had been taken from its roost in the hoop coop. Whatever dropped it was either having trouble getting the carcass over/through the fence/gate, or dropped it and ran because I came out of the house. Probably the latter. I looked up and saw a pair of orange eyes watching me from the neighbor's yard on the other side of the gate. Whatever it was did not look away from my headlight. It only moved when I moved forward. Then it retreated a few feet, stopped and watched me again. We repeated that maneuver several times. I couldn't get close enough to see any outline so I don't know what it was, but it appeared to be alone and was completely stealthy. No sound when it moved. I will check that area for tracks in the morning.
Still trying to figure out what it is. Wondering if it's a fox because it would be the right size, there was no sign of disturbance in the coop, there was little damage to the bird, and whatever it is was big enough to cart off a 5-6 lb. hen. Could be a bobcat but I thought bobcat eyes usually shine green, not orange. We have had bobcat in the area in the past. We also have coyotes but this was a solitary animal.
DesertChic suggested coatimundi, but I'm in the middle of a creosote flat. It's not typical coati territory. Someone else suggested badger, which is possible but I've not seen any signs of digging in the area. This chicken was taken off its roost tonight, about 3' off the ground, and there was very little commotion from the other coop residents when it happened. So I'm skeptical of the badger idea but haven't ruled it out. Don't know enough about how they typically kill/eat their prey. But the kill/carry off pattern seems to fit what I've read about foxes pretty well. Never seen a fox around here, either, but they are found in creosote flats. So it could be one.
In the meantime, if this keeps up I may not have to worry about culling the flock. The predators are doing it for me. Sigh.