Duck embryo developing too fast?

[BelovedBirds]

How does this look for day 18 out of 28? This is my first time incubating duck eggs. The duckling is active and moving around, and although it might not be as clear in photos, it has very good veins. My other duck egg is 3.5 days behind, but seems to be developing at a perfect rate based on the charts and videos I have watched.
But this duckling seems to already fill so much of the egg. The egg is slightly smaller than usual, very very slightly, which is why I still went ahead and incubated. Opinions would be appreciated!

 

[Crazy Duck Lover]

Looks good to me! I guess they all develop at different rates

 

[BelovedBirds]

Looks good to me! I guess they all develop at different rates

that's a relief! Hopefully should be okay

 

[FoodFreedomNow]

Is the air cell smaller than it should be at this stage of development? If so, you may want to adjust your incubator's humidity accordingly.

Best of luck with your hatch!

 

[BelovedBirds]

Is the air cell smaller than it should be at this stage of development? If so, you may want to adjust your incubator's humidity accordingly.

Best of luck with your hatch!

It doesnt really show up on the picture, but I think the air cell is about right for this stage-
Thanks am hoping for a healthy hatch