Robert:
Thanks for the reply and good to see you are participating in this forum. You would have a lot of valuable information to share on a variety of topics.
On the topic of this fence option, I had surmised that yours was a "large acreage" option.......with "large" being a subjective term........as is a "piece of string". How long, exactly, is a piece of string? Would large be 1 acre or 10? My guess is it is relative, with "large" being large enough they are not so confined as to destroy the vegetation to the point they feel compelled to go outside the boundaries to get more? Or else on the outer limits of how far they naturally would want to venture from their housing?
My daughter started a group of chicks last year thinking she had all hens, but unknown to her, they were straight run, so lost half her laying flock of hens when half turned out to be roosters. When the small run she had the remaining hens in turned into a mud hole, she eventually turned them out to free range on her 3 acre half wooded lot. They covered most of it and were doing fine and having a ball, until the fox found them. It quickly got them all. It still returns almost daily looking for more.
If she could confine her small flock of half dozen birds or so to half an acre or so, and keep them safe inside even a two or three wire hot fence........she would probably do it. Her problem is all the woods, which canopy over the property lines, so would allow racoons to cross the fence from above. If that doesn't work, she might be able to use poultry netting to confine them into an even more protected area, and if/when they tear that up, move it. This is a daytime problem as she locks them up at night.
That is the option I intend to be using.......poultry netting in a small confined run area that is part of an expanding garden.....and let them tear it up on purpose. Then move it. But I'd also let them scatter over a half acre or so outside the garden...and area too large for netting, but hopefully could use 1, 2 or 3 hot wires........if they will stay in it and if I can keep all the varmits out. My land area is mostly open, with only a few scattered shade trees.
The ground based varmits I already know about includes skunks, possums, racoons, bobcats, coyotes and foxes, plus domestic and feral cats and neighbors dogs. With all that to contend with, my plan is to get an AC charged fencer hot enough to rattle their teeth loose if they (varmits) try to cross it.