Help! Chicken eggs to dark to candle?

[molly1chickens]

I have a few chicken eggs that are very dark and some have dark speckles on them so it is very hard to candle them because they are not opaque and I can't see properly. What should I do?

 

[ChickenCanoe]

What I do is don't candle. I weigh eggs to determine if they're losing the proper amount of weight. I remove any leakers or stinkers. At lockdown I try to candle to see if there is much clear space or if it is all dark.