From egg to chick
저자: Lorraine O' Neill
1. sitting hen
1.1. 21 days
2. hen keeps chicks under her
3. chicks grow
3.1. mother feeds them
3.1.1. mother teaches them
4. Hen lays eggs
4.1. nesting
4.2. broody
5. hatching starts
5.1. 21 days
5.1.1. 24-48 hrs all chickens hatched
5.1.1.1. New node