I have a person who bought 6 silkie hatching eggs from me and has not had a successful hatch. This customer has hatched turkey and game bird successfully before, but never chickens (I'm not sure if that matters though). My main concern is that they did not use a hydrometer, the just followed the directions on their foam incubator- could this have played a role in the bad hatch? Could shipping the eggs have played part in 3-4 late term quitters and one chick that did not make it? I have fantasic hatch rates here, but I know exactly where my humidity is, etc, and of course they haven't been shippedm Thanks for your opinion!