Chicks seem underdeveloped at day 18

[Orangeblossomhoney]

Update. Despite appearing underdeveloped on day 18, those eggs are hatching right alongside the eggs that appeared further along. I haven't compared them to the other chicks for size yet, only observed them through the glass in the Hatcher.

I had left some of the questionable eggs in the incubator, in case they needed more time to incubate, and they hatched right there in the egg turners. Lol.
Glad to know that my fears were unfounded.