Will chicken wire keep hawks out? doesn't seem like it... and I was planning on lining the bottom of the coop with 1/2" hardware cloth and the run with 2x4 welded wire so no critters can get in seeing as I'm building a mobile coop/ tractor I can't bury wire. Do you think the chickens will injure themselves scratching in between the 2x4? I just want my chicks to be as safe as possible!