I had a hen go broody and so I bought a half dozen fertile eggs. Today was day 6 -- and I haven't really done much of anything, just let her sit on them. Now I'm looking around this part of the board for the first time and trying to learn the lingo. What does "pip" mean? I tried candling earlier this evening with a flashlight (the only light I had) and I'm hoping it just wasn't strong enough, because I didn't see a thing. Should I be worried, or should I just get a brighter light source?