When to candle?

[bgb02]

This is my first time with a broody hen she has 12 eggs under her when should I candle them to see if they are fertile or infertile. I am not using an incubator but letting mama hen do the word.

 

[bobbi-j]

I'd wait until 5 days or so, so you can see definite development. Here is a link to the best pictures I have seen of candled eggs so you have something to go by: https://www.backyardchickens.com/a/candling-pics-progression-through-incubation-of-chicken-eggs