Chicken wire does NOT keep predators out. Please do a search on this site for "Chicken wire" and read how many times, over and over people complain about dead chicks/chickens/ducks...because they THOUGHT chicken wire was safe.
We live in Minnesota, and ours went outside after about 4 weeks. Pen has draft protection on 3 sides, and I put up a 4x8 plywood to somewhat block wind on the 4th side. They're 8 weeks tomorrow and no ill effects.