Silly site, uses frame, so cannot easily post link. But I couldn't find something for Chooks, but I did find this to keep foxes and badgers out (its a 3-line fence)

Badger/Fox fencing

I quite fancy the idea of an electric-net-fence, hadn't thought about that.

Googled and found this, so no I see what you mean, looks perfect:

Electric Fencing Kits - 50m Electric Poultry Pen Kits