I have a funny story about my Ayam Cemani hen. She is just starting to lay, and she was in a lay pen that was very dark. Normally she is very skiddish, but since she was setting in her dark nest, when I peeked in at her it was hard to see anything but blackness, she seemed to know in the dark she was invisible and didn't get skiddish on me. Of course when hens sit, some times they go stoic.