"Unnormal" circumstances?
My family humanely raises heritage breed ducks now, which work in our large organic veggie and berry garden, foraging pests, weeding, and providing us with eggs and meat, but we used to raise chickens before we moved to our new place. At max, we'd have around 15 hens at any one time, which free-ranged in tractors (which is basically a fence on wheels, so predators wouldn't eat them alive) on a 5 acre plot of pasture land. Their main run was a mobile tractor with a wheeled coop, approx. 28'x15'. That's a lot of room for just 15 hens, and it moved from spot-to-spot daily.
So obviously we didn't raise our hens that way, and obviously our animals have a pretty damn pastoral, wonderful life, but I've got no problem with the hens shown in that picture being raised like that either.
Why not? Because the more you know about the bird, the more you know it's not cruel.
See, when the hens would get down to business, even though they had tons of free space everywhere, they'd always go into their coop, and into tiny 1'x1'x1' cubes to lay their eggs. It's natural for them to do that. Often there would be two hens squeezed into the same cube, even even though there were plenty of empty cubes. It's like a nest, and it is part of their instinct to lay in a confined space where they are comfortable that they wont be pounced upon by a predator while they are so vulnerable. You cannot underestimate how vulnerable to predators laying hens are, and how hard-wired into their instinct this vulnerability is. Hens also instinctually know their eggs are vulnerable, not just from predators, but also for the fact that other chickens, roosters and hens alike, may sometimes get a "taste" for eggs too, and may attempt to eat the eggs. (A farmer always has to monitor this problem.) When they are in a small space, with other hens, they feel safe from predators, and they feel the place is a safe place to lay, too.
Furthermore, hens are designed by nature to be able to literally not move from one spot for literally weeks at a time. This is what naturally happens when hens get "broody" -- they REALLY don't want to do anything or go anywhere. They will get upset to the point of almost suicide if you try to make them move. Nature has created the hen with this behavior in mind, so they don't physically need to "stretch their legs" or whatever you or I would desire to do.
Please don't take offense, but I think you need to actually take the time to get to know the species of animal you are talking about before making judgements on what is "unnatural" or not. Hens are not humans. They require different things. Their natural instincts are different. You cannot anthropomorphize livestock and achieve any real sense of the true nature of the animal.