I looked for the 6-foot poultry fence on the web, and cannot find it. I guess it is just not popular anymore. You could use 2x2" wire and add a 1' section of chicken wire to the bottom to keep the little guys in. The electric wire will probably do more than anything else anyway. I think that you can still get the fencing that I suggested for game animals, but it is pretty pricey.

https://afence.com/store/330-X78-GAMEFENCE.html