Black Copper Maran Eggs Darken during Incubation?

[Mother Clucker Free Range]

I have some FBCM eggs in my incubator. I have noticed they seem a bit darker after a couple weeks of incubation. Is this a sign the eggs are no good or is this normal? It is my first time with FBCM.
Thank you in advance for any wisdom on this.

 

[Cayden05]

I have some FBCM eggs in my incubator. I have noticed they seem a bit darker after a couple weeks of incubation. Is this a sign the eggs are no good or is this normal? It is my first time with FBCM.
Thank you in advance for any wisdom on this. ☺

That is normal. FBCM eggs are very difficult to see into when candling.

 

[Mother Clucker Free Range]

Yes I have never been able to candle them but now the shells seem even darker than when incubation began.

 

[Cayden05]

Yes I have never been able to candle them but now the shells seem even darker than when incubation began.

Yeah FBCM eggs are naturally one of the darkest chicken eggs so this is totally normal

 

[BenTN]

Normal. If they begin to sweat or smell then you may have a bad egg.

 

[Mother Clucker Free Range]

Normal. If they begin to sweat or smell then you may have a bad egg.

Thank you so much! That is very helpful.