odd looking air cell

[lfrye11]

hey, i was candleing my duck eggs(day 20/28) and about three of them had a little half-circle growing from the original air sac. i’ll attach some pics. also, what day will my bantam silkie chicks hatch? i’ve heard anywhere from 18-21. thanks!

 

[Mysticalys]

View attachment 1288700 hey, i was candleing my duck eggs(day 20/28) and about three of them had a little half-circle growing from the original air sac. i’ll attach some pics. also, what day will my bantam silkie chicks hatch? i’ve heard anywhere from 18-21. thanks!

It should be fine I have a goose egg that has that that I am incubating and it pipped today but I don’t know if you are hatching or eating your egg so

 

[lfrye11]

i’m hatching it