Crushed egg shells

[Bobswing1]

Good Day to all my name is Bobswing1
I am a new chicken tender with 25 chickens from 1 week old to 1-year-old, Also have 13 Guineas.
My question is: Would it be ok to give my chickens (Silkies, Banny, Polish) ground up eggshells? Most birds are 1 year old. Have 10 new babies 1 week old

 

[Punkybrewster]

The ones laying, yes.
The young ones not laying yet, no.