I have hatched several dozen successful incubated guinea and duck eggs... BUT each time I try incubating chicken eggs they seem to die about day 18-20 and can't figure out what I am doing wrong??? temp 99.5 humidity @ 63-65%...."still air" little giant incubator... I candle my eggs, see growth this last batch, as with the others,heard faint pecking day 18/19 (checked different eggs at random).... so, any suggestions?? I want to incubate chicken eggs too!