Our chicken house/run is nestled between oaks, because well... we're on 29acres of mostly oaks, and it's very difficult to find a spot that isn't (and those spots are needed for gardens!). But, there's a huge wild rose bush, nearby, as well as an enormous ticket of wild blackberries, and I put a pair of potted blueberry bushes, on either corner of the run.
We do have high predator pressure from both ground and air, and our girls often take refuge from the local predators and the sun, under the blackberries and the rose bush. Those are favorite spots for resting, between bouts of the hard labor of foraging. They love it under there - it's cool, and they can safely take naps, even with the hawks and bald eagles hunting, above.