I set a (duck) egg last Tuesday. I candled it today and don't see any veins. I set it it in my hova-bator on an automatic turner. This is my second time hatching my own but it's hard to remember what the first week was like. We I slowly move the egg side to side I can see some web looking stuff swaying around that is stuck to the bottom of the egg. There is nothing such as a "blob" At the top of the egg near the air sack..and no veins. The yolk is "big" and vibrant. I feel like I know what I'm looking for as far as veins go and I don't see any sign of life inside the egg. Is it possible that if I give it a few more days that something can appear? Has it happened to you, that you thought one wasn't fertile then gave it time and turned out it was?