how long do you wait after the 21st day?

[vbdeleon]

First time hatching and we have tried to keep the temp and humidity even. How many days do you usually wait until you call it a bust? We set 12 eggs, Thursday was day 21 and nothing has happened yet.

 

[rebelcowboysnb]

I would candle tonight an throw them away if there is no movement in any.