This is my first hatch and I'm new to the hatching/incubating process. I've seen some people refer to the piping that goes on near day twenty or so. My question is...what exactly is piping? Is that when they peep and if so is there anything you should do for them, or help them out? What are some key things I should know and when one chick gets out, should I let him roam in the bator for a day or so until the others hatch or pull him out and put him in the brooder? Advice?