Electric chicken netting! Oh, definitely. Just in the last few minutes, on this bright, sunny Sunday morning, I hear the rooster making his danger call - which resembles a hen's egg song. Silly me, I went to the door and called out to the roo - questioning his intelligence, thinking he was merely spouting off for the sake of spouting off. And then I saw the fox lurking along the outer perimeter of the electric netting fence. Of course, my calling out to the roo alerted the fox pronto, and I missed my chance to shoot at the little bugger - which believe me, I am ready to do. I lost four hens to this fox in the week before I put the electric netting fence up. Mine's hard wired - 110v. I leave it set on "rabbit," which is the fastest repeating pulse speed.
A tall wire fence will not keep out foxes. I know first hand that they will scale a 6' fence without a second thought.
The electric netting will not deter aerial predators. Placing overhead netted areas within the circumference of the wired area, and/or having trees/shrubs/structures that the birds can dart under when needed, helps guard against sky predators.
Having a good roo keeping an eye on things is my favorite, though not the most effective, line of defense! He does everything he can; but I'm still the one with the opposable thumb, though. It's my job to add technology where needed.