I have 8 chicks right now and getting them used to my hands (petting and holding). I will put them in a little play pen so it's easier to see them and for them to see me. I made it out of two old shoe boxes and am wondering if the lip in between the two is too big. They can get across it just fine, but I'm worried they might hurt themselves and just wanted somebody else's opinion/advice. The blue box is their regular brooder and the other is the "play pen"