The first coop and run we built we made the run out of lattice on the outside and hardwire cloth on the inside. We had ivy growing all over the coop and the run. The chickens didn't seem to bother it at all. On our new coop and run we are building, I don't know if we will do the lattice this time or not. I was sort of trying to hide them the first time around. This time I am not worried about that, plus there is a lot of trees and plants around them already. Anyway, if I grow anything over their run this time, it will be grapes.