I just got my first flock about a month ago and I have already lost one to a wandering black lab. I build a pen out of chicken wire and attached it to my coop but unfortunately, I didn't add netting to the top. I assume the dog spooked my 6 week old chick and she jumped out and over the wire because none of the pen was destroyed. I decided to put a bird netting over the top to keep this from happening again. I leave them out all day while I'm at work and I need a very secure pen so that I don't worry all day. I would appreciate any advice on keeping my outdoor pen predator proof...I love these little guys and I don't want to lose another. Thanks!!!