We have a 20 x 12 run right now, with only a 12x12 area under sunshade cloth. There are lots of predators like owls, possums, etc. in our place and i want to cover the entire top of the run, including over the sunshade cloth. do i "have" to use the 1" chicken wire or would a 2" chicken wire keep out the owls? i am planning on putting a hot wire around the run also, so that is why i am going with chicken wire instead of something else more sturdy. The chickens are locked up at night in a secure coop and i just feel uneasy with part of the top open like that during the day.