Puzzling egg...well after hatch day.. is it alive?

[Lydiacytlau]

Hi all. I have a runner duck egg well past hatch day. Now would be day 33.

I saw it wobbling and moving when candling until day 28. But it went still and had a day 20 size small air cell at that time. I'd given up on it as there are no signs of life for 4 or 5 days.

I was going to chuck it tonight but candled for a last time. The air cell has grown a fair bit but is kind of saddle shaped. Still no movement. It smells fine. Would the air cell grow like this with a dead duckling inside? Not sure what to do. I'd just leave it and wait to see but I'm using the incubator to house a sickly duckling and dont want to risk an explosion.

I should point out conditions have not been ideal. It's a home made incy after my brinsea broke a week in... eek... so hardly stable conditions.

Thanks to anyone with a viewpoint, I appreciate any thoughts!

 

[Isaac 0]

Welcome to BackYard Chickens!

Could you post a candling photo of the egg so we can see what you are seeing? Most likely a dud if its on day 33 unless you counted wrong.

 

[Lydiacytlau]

Thanks for replying. Might be 32 days. The temp and humidity have both been on the low end. Sure here are 3 pics of the air sac I have rotated so you can see all sides. You cant see my pencil lines really but I'd say the air cell has grown about 1cm down the egg in last 4 days, and gone wonky in places where it was a neat circle before. Thanks again!

 

[Isaac 0]

Try candling from a few other spots within the egg, and tell me if you see any pockets of air.

 

[Lydiacytlau]

Just tried all angles, no other pockets I can find in there.