We have had chickens in the past, and while I fully support anyone wanting to do their own chickens, the level of effort to keep them clean and healthy, safe from predators, and the labor to take care of them is non-trivial. They were the most expensive and labor-intensive "free eggs" we ever had.
It is a lot of work, but after my last group was killed off 2 months I have not impressed by store eggs, so I'm planning on re-enforcing my coop so I can get another group of them soon.
so the birds get a point for each level of protection they receive. each group needs two points to be safe.
i mainly raise geese, which are tough, not going to be bothered by a hawk. geese (turkeys similar) start with one point. an electric fence is one point, a fully enclosed coop is one point, night light (.5?), guard animal (.5?). chickens are always inventing ways to die, so they start with 0 (should probably be -1).
fingers crossed i haven’t lost any geese to land predators in three years and only one chicken that flew the enclosure. hawks have taken a few chickens, but never when the geese are around.
We have a very reinforced coop and an automatic coop door so we've never had any issues.