Oh, this morning I had the chickens out while I was doing my morning chores. Watered the dogs, came back into the garden area, and the chickens were under Big Red (this big red table I have). Something caught my eye, it was a hawk flying out from my palo verde tree--must have been checking out the chickens. I'm pretty sure it was only a cooper's hawk, which seems way too small to be going after a chicken! We have a couple of pairs that hang out around here. Maybe my little bantam Polish/silkie mixes were looking particularly appetizing this morning.
We live off a natural wash, and have tons of coyotes and several bobcats roaming through. So far, no issues with coyotes jumping over the wrought iron fence, but we have seen them staring in. We have 3 big dogs, so that might be a deterrent (we also have 1 small dog, a tasty coyote treat). I've found a couple of small dogs in the wash, partially eaten, so I know it happens. A bobcat will probably be the most likely thing to get my chickens. Their coop and run is predator-proof, but one of these days a bobcat is going to slink in while they are roaming in the garden and snatch one away. I'm out in the yard a lot, but not always, and even so, I've heard many stories of a bobcat getting chickens with the owner mere feet away.
The Cooper's are generally O.K. as long as you have LF and they're fully grown. They will try to take smaller chickens though. Weirdly enough, last week one flew in and grabbed my FBCM (fully grown) by the back but didn't latch on well. I was standing just 5' away! It made me wonder if the hawk was testing the chicken to see what it would do. My wife has a friend/co-worker who lives here inside Tucson and had a bobcat take a chicken right in front of her. She tried to chase the bobcat away, but it was so bold, it wouldn't budge and ate the bird right there, growling at her whenever she got too close. She got it on video too, it was chilling to see.