folks who want to free range seem to, sooner or later, have to deal with total devastation, one way or another. I live in an urban area where roosters aren't allowed, so that's not even a possibility. you must keep the birds and food protected at night, that's a bottom line that I don't see anyone getting away from, at least eventually. you can do that by either making a small fort knox coop that is wall to wall hardware cloth, or you can go much larger with electric fencing, netting overhead and a fort knox inner coop enveloped in hardware cloth that is closed at night. you either need to except that occasionally you will lose everything, or you need to invest to keep the critters out. for me, peace of mind is gold, so I spent the money up front and made the coop impervious, learned about the micro biome and deep litter method and so far, fingers crossed, produce 400 lbs of meat a year and lots of eggs and no preditors and no major losses to disease. maybe i've just been lucky.