How can I tell if any of my hens eggs are fertile?

[kerriliane]

Hi! I have 37 hens and 2 active roos.. and 2 roos that havent figured it out yet..
How do I know if any of my eggs are fertile?
I've tried holding them up to light.. but dont know what to look for!
thanks!

 

[rebelcowboysnb]

Cant that way. You have to break them an look for the white spot on the yoke. Infertile have a little dot. Fertiles have a bigger dot with a ring around it like a bulls-eye.

 

[Sunny Side Up]

This thread tells it best: https://www.backyardchickens.com/forum/viewtopic.php?id=16008

 

[kerriliane]

I found one out of my 8 yesterday, to have a larger white spot.. and it's an egg that I get one of everyday and they have funny little creases one them...
So I took the one I got from her today and I took the egg from the same chicken that I got 4 days ago out of the fridge, and put them in my incubator... Hopefully something happens. Right now i just feel silly to have light on some eggs ya know!?