My chicken run is covered with 2" chicken wire. It was the least expensive, is flexible to work with, it works better than 1" or smaller when there is a snow load ( I just put on a hooded jacket & go inside the run to tap inside the wire cover & the snow easily falls thru, instead of being impossible to clear the collapsing snow load) & I was not concerned about the prey birds trying to get thru it as it has covered my chicken runs for many years. Smart to cover their run. Best wishes.