So we had a broody hen so I got her some fertilized eggs. On day 19 I went out to candle them and I found one with a hole in it. We were so excited. The next morning it was fully hatched. Well it is now day 23 and the other 5 have not hatched and she is no longer sitting on them.is it to late for them? Can I put a heat lamp on them and they still hatch? I candles them along the way and they were all the same with vains and dark spit's in them and now only one hatched What do I do.