Predators are definitely location dependent. They also depend on micro conditions - ie IME daytime predators are less likely to come at chickens if there are more people around or other species around in the immediate area compared to other areas they might like to hang out.
One thing is that once you have a predator incident you generally have to upgrade security immediately because otherwise you will be that predator’s new favorite restaurant.
In general keeping chickens means that there will be chicken deaths on fairly short timescales. There might be different levels of security for your best breeding and show chickens than the random egg-layers or the extra cockerels. But you have to decide for yourself what works.
Chicken ‘tractors’ are another option - enclosed cages with a roof that are ‘easy’ to drag over the ground. As a practical matter, I find it a challenge to make them both predator safe and portable enough. At night I need my birds surrounded on all six sides with plywood, concrete, or hardware cloth.
Also: breed matters. Some chickens are more active and better at free ranging both in the seeking bugs and in the evading predator department than others. Larger, active chickens are a good choice.
