I'm kicking myself today! I can't even eat. My chicks were ready to leave the brooder. We took 20 of my babies and put them in the big pen. They were running around so happy! I went to check on them this morning and they were GONE! Just gone! No sign of a struggle. I was so upset. And now that I know HOW this happened, I'm even more upset! My husband found 3 of them running around in the neighbors yard. He put them back in and they just ran right thru the fencing! They looked a lot bigger than their bone structure! I even asked him last night, you sure they can't fit thru the fence holes? He said, no way, they're too big. I said, ok but we need to reinforce this pen for predators soon! I didn't even consider them running away and getting eaten! I was only thinking something might come inside and get them! I am SOOOOO heartbroken! I raised those babies from a day old! :-(