first of all I am hatching my first eggs soon and I want to know what a pip is. I see it all of the time but I don't know what I am looking for. Also looking for advise on candling. How long should I candle for before it is too late and not to pick up eggs? I also see that my brown eggs have gone opaque. They are almost to day 21. Is that normal of shoule Ibe able to see something?Any feedback wold be appreciated, I would like to spare myself from own ignorance. edited to add this Also will they stop moving when they are closer to hatching?