A simple wooden structure wrapped with chicken wire netting and that's it.. you built a chicken run.
This building pictures guide of my chicken coop aviary will give to you some idea to design your and meet your needs.
Read more: My chicken run and aviary building pictures idea
►1: Poultry Netting and Material
►2: Chicken run framing - Frame Construction
►3: Install aviary netting - Chicken wire netting
French instructions: http://www.france-jardinage.com/voliere/voliere.html