Duck Eggs

Update to my previous post. I have a couple eggs with vein-like circles. I’m no duck expert but I’m wondering if they’re growing properly. Ay advice? These are only 3 out of the 11 I’ve found. Three have gone bad so far.

I don’t see veins in your pics. Maybe that’s just me or maybe it’s just tough to photograph them. My pullets are all nuns at present and I’m new to chickens but these don’t look like the photos I’ve seen of developing eggs. They should look like a little spider at the center of a crazy web. The rings in the photo look like blood rings you get when a chick has stopped developing and is dead. (Sorry) Don’t take my observations as more than book learning, though. Go to Backyard Chickens (if you don’t get more answers than mine) and ask on the incubator forum there.

I waited to see what they’d do because I knew blood rings expanded, and #3 did expand so it was a blood ring, though when I cracked it open there was no duckling, even though it was one of the older eggs. The other two seem the same, and there is a pink dot in the center of both. In a previous egg I had go bad, there was a duckling about that size inside. I will continue to watch but it seems like they’re doing fine.

How long had those eggs been incubating?  I candle eggs at one week, and I'd say those are duds if they were a week into incubation