I had two heavy squashes on top of the brooder to keep the cat out. When I opened it one rolled in and broke a chicks neck. In front of my 8&5 year olds. It was AWFUL. I haven't been this upset in a long time. Her neck was broken. She was buried in the back yard, my son named her "sweet little angel" and made her a headstone with one of his treasured rocks. This was our first incubator hatching (13 of 17 have hatched so far). I'm heartsick.