So, I went ahead and candled and marked air cells. All 14 of the shipped silkie eggs that I thought were developing are. A couple of them look real faint though. Almost like the membrane is thick and makes it hard to see. I can see the veining, but not the embryo itself, so we will just wait and see. those veins have to go to some place. All 9 of the Spitzhauben eggs are developing and from what I can tell 5 out 6 of the green ones are developing. The air cells of the green ones actually look decent too. So we've made it one week so far. The air cells on the silkies vary widely, so they give me a little concern, but overall I t hink they are doing well.
Hmm makes me wonder if silkies have a thicker membrane? Dunno keep us posted though!