Take it from a life-long farm girl.
Lot's of those country chickens die. LOL
It just depends on what your predator load is.
I've come out in the morning to bloody, mangled messes of dead and dying chickens by the score, on more than one occasion.
Ways I've lost more chickens than I can count...
Hawks - lose a couple of chickens a day that way if a pair decides some woods near your place looks like home. (I've got a cure for this one, though. LOL)
Weasels - you'll know weasels have been in your coop because there is blood everywhere. No chickens, just lots of blood.
Racoons - When you visit your chickens in the morning and find one hanging from the fence, headless. Like it got it's head pulled through, then chopped clean off. Which it likely did.
Neighbors - the puppy drowning kind. Yeah, I've lost lots of birds that way. His birds on my property were fine, mine on his - he shot and threw over the fence into my driveway.
Dogs - people move out from the city and think Fido finally gets to experience life as nature intended. Fido does. He wanders off his own place, goes to yours, and 90% of your chickens are dead - and Fido is bouncing around like drug-fueled lunatic, high on a happy killing spree.
Coyote - Same as dogs, but not as mean. They only hunt to eat. But they come back every time they are hungry.
Bobcat, Bear, Fox, and Mountain Lion - I've been spared these guys so far. They are pretty shy and prefer to keep their distance when possible. I've seen them around, but they've not bothered me.
I've been in places where the losses are not too high. Generally that is the result of the farmer having his own dogs who scare off the predators. Also keeping a wide area around the coop clear of brush and growth. I'd recommend 50 feet, at least, but the more the better.
Enough so the dogs can easily see all around from where ever they are.
Towns can have a lot of these same predators. You just have to know what's in your area.