Broody hen brooding question

[Barnmaradotte]

Now, I heard that with incubating, you count 21 days from 24hrs after going in the bator. Is that the same with putting them under a hen? Or is it 21 days from the day you put them under a hen. Any input would be great.

 

[Arielle]

Same counting method. THe nice thing with a hen, the eggs seem to hatch closer together. GL