If you really want your birds to be safe you need to build something that doesn't rely on just electricity, all kinds of things can go wrong from the fencer wearing out or grounding out to loss of power.
It is not really all that expensive to build a good solid predator-proof pen - it does take a lot of hard work though. I can remember the hours it took to dig trenches to bury the entire perimeter fence around 2 pens. Considering rocks grow better here than anything else, it was a lot of work with a pickaxe and shovel. However, I never need to be concerned about something digging in.
Most welded wire has 2x4 openings. That will keep out larger predators, but nothing smaller, so you would still have to cover it with hardware cloth. Even the holes in chicken wire are too large for the lower part of the fence, as raccoons can reach through it and grab chickens, pulling them up to the fence and killing them
It is not really all that expensive to build a good solid predator-proof pen - it does take a lot of hard work though. I can remember the hours it took to dig trenches to bury the entire perimeter fence around 2 pens. Considering rocks grow better here than anything else, it was a lot of work with a pickaxe and shovel. However, I never need to be concerned about something digging in.
Most welded wire has 2x4 openings. That will keep out larger predators, but nothing smaller, so you would still have to cover it with hardware cloth. Even the holes in chicken wire are too large for the lower part of the fence, as raccoons can reach through it and grab chickens, pulling them up to the fence and killing them
