Since my husband likes eggs, and the price of them keeps going up, I just suggested to him (again) that maybe we should get some chickens just for eggs. I figure they would live pretty well out in the horse pasture, eating all the bugs the horse attracts.
Besides a shallow pan of water and maybe some feed if they don't seem to be feeding themselves enough (did I mention the horse attracts a lot of bugs???), what else do you need to know to keep a grown chicken? They sell some that are almost mature at the local flea market, so I don't need to worry about having chicks.
We have trees in our pasture, one of which--a cedar--they can roost in (I know that has historically been a good chicken-roost). The fence is electric rope, one strand of which is low to keep dogs out. I would assume it would keep the chickens in too, so they should be safe. Everyone else around us seems to have free-roaming chickens, so I can't tell if anything more than water and maybe feed would be needed (at least in the summer; I know we'd have to have somewhere warm for them to go in winter).