I've been candling my eggs (day 7) and seem to see some really good development and others seem like duds. Some of the eggs don't seem to have a short snout on one side and a more pointed side - they are symetrical. How do you know how to put them back into the bator? Which side up? Or doesn't it matter? ps. I have one group of eggs that have what appears to be a very speckled shell and there doesn't appear to be any development in most of them. Could a thinner more porous eggshell cause this problem? Thanks for any insight. I'm saddened to not see some development after 7 days. Oh, also how long can you leave the egg out of the bator for candling?