Candling Eggs -- What does a rotten one look like?

[BettyGoosie]

I would like to candle some goose eggs that I suspect are rotten. I have never candled before and know very little about it, only watched some videos, but there are no videos of candling rotten eggs, just early-stage unfertilized ones.

The eggs are about 30 days old, so any idea of what it would look like needs to factor in that they have been incubated for quite some time. Would an unfertilized egg look different at 30 days vs 7 days if it was actively incubated, and would it look different if the problem was embryo death versus non-fertilization? Or does a bad egg sat on for 30 days look the same no matter what the cause?

Thank you for any help.

 

[Skittlez]

I just had to get rid of a rotten egg, but it was a duck egg. The egg had a light green shell. I could clearly see a very dark mass thru the egg without even candleing it. It did not seep, but it did smell foul. I only have one goose and she lays a white egg. She never went broody, thankfully, so I collected her egg every other day. But, I can tell you I have had rotten chicken and duck eggs and they were pretty similar as far as smell and being able to see the goo inside the egg without needing to candle them. I hope this helps at least a little.

 

[floridachickhatcher]

Quote:
when i first started candling eggs i didnt know what to look for either so i found this page http://shilala.homestead.com/candling.html

 

[HenPenny]

If it's rotten you can smell it! No need to candle it for the confirmatiom.