White circles in egg yolk help

[Nicfuel]

Hi I’ve had chickens for several years now and have never seen this. Has anyone else? It’s been cold n WV but the eggs have not been frozen. I have no roosters...that I’m aware of. I did add 6 chicks this past fall but they all seem to be hens

yolk

 

[Sue Gremlin]

That's WEIRD! They look like germinal disks but they can't possibly be! Can they? Are they as prominent when the eggs aren't cooked?

 

[CrazyCrttr75]

I would be worried about worms. I could be wrong as I have never run across this before and maybe there is a different explanation for it but that is the first thing that comes to my mind. I hope I am wrong.

 

[coach723]

Not worms. I believe this happens due to variations in moisture levels, and the degree of cooking in the yolk and the effects on the proteins. I don't think there is anything wrong with the eggs. If the yolks were cooked to a harder finish the rings wouldn't be visible. There was an article or thread somewhere that discussed this before, I think, I will try to find it, but it may take awhile (If I ever do find it). I did find this one, which doesn't address this exactly, but does explain what happens when eggs cook.
https://pdfs.semanticscholar.org/1f21/bc1621fe8d091e1fca849676891d70c2c9ae.pdf

 

[aart]

I’ve had chickens for several years now and have never seen this. Has anyone else?

Could you see the circles before cooking?

 

[CrazyCrttr75]

Not worms. I believe this happens due to variations in moisture levels, and the degree of cooking in the yolk and the effects on the proteins. I don't think there is anything wrong with the eggs. If the yolks were cooked to a harder finish the rings wouldn't be visible. There was an article or thread somewhere that discussed this before, I think, I will try to find it, but it may take awhile (If I ever do find it). I did find this one, which doesn't address this exactly, but does explain what happens when eggs cook.
https://pdfs.semanticscholar.org/1f21/bc1621fe8d091e1fca849676891d70c2c9ae.pdf

I am so glad you were knowledgeable on this matter and were able to help them! And now I know as well because if that would have happened to me, I would have freaked out lol!

 

[Nicfuel]

That's WEIRD! They look like germinal disks but they can't possibly be! Can they? Are they as prominent when the eggs aren't cooked?

Hi I thought so too! Not at all distinct once cooked.

 

[Nicfuel]

Not worms. I believe this happens due to variations in moisture levels, and the degree of cooking in the yolk and the effects on the proteins. I don't think there is anything wrong with the eggs. If the yolks were cooked to a harder finish the rings wouldn't be visible. There was an article or thread somewhere that discussed this before, I think, I will try to find it, but it may take awhile (If I ever do find it). I did find this one, which doesn't address this exactly, but does explain what happens when eggs cook.
https://pdfs.semanticscholar.org/1f21/bc1621fe8d091e1fca849676891d70c2c9ae.pdf

Thank you so much that’s super helpful!! )

 

[coach723]

I'm still looking, did find this thread:
https://www.backyardchickens.com/threads/spots-on-egg-yolks.1222458/Posts #2 and #3 have links that might be helpful.

 

[Nicfuel]

I'm still looking, did find this thread:
https://www.backyardchickens.com/threads/spots-on-egg-yolks.1222458/Posts #2 and #3 have links that might be helpful.

Thank you so much for looking for those!!