How many days old should be eggs to hatch

[mili137]

Hello one of my hens is broody and i dont know how many days old should be the eggs

 

[Stacyoung13]

Are you wanting to put eggs under her? If so, the fresher the egg is, the better chance you have of it hatching.

 

[Jbently28]

I typically go by the 10 days old rule. It is possible for them to hatch when they are older than 10 days, but you'll have more of a success rate the younger they are.