Can you tell an egg is fertilized without cracking it?

[Householder Homestead]

Is there anyway to tell an egg is fertilized without cracking it open? I have 12 hens and 1 rooster and see him getting it done with several, but my 2 biggest girls brush him off pretty much every time I'm out with them, so I'm not sure their eggs are fertilized. I'd rather not spend the time to incubate them if they're not fertile.

 

[cavemanrich]

You just need to crack one or two from those hens,,, and determine. If those are fertile,,, then the rest should be also.
No way to determine without visually looking at the bulls, eye on the yolk.that I'm aware of.
Consider the fact,, that once the hen is serviced by a rooster,, she stores enough sperm inside for 3 weeks of egg production.

WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,and

 

[Weeg]

The only way would be to incubate it. Incubate for about 5 days and you should see an embryo firing. At that point you’d have to hatch it though.

 

[ChickenCanoe]

The short answer is no.
The easy way is to open some eggs when you cook and look for the halo. If your current eggs are fertile, those that follow will be as well.

 

[Weeg]

Just crack a couple. If you incubate, you’ll be able to tell after a few days, do not a total loss.