Double Shelled Egg - Different colors of shell

[annabelle71]

 

[ChickenCanoe]

It is not common but I lecture on it in some of my chicken classes.
Since it is so uncommon, it hasn't been widely studied.
It happens when an egg reverses in the oviduct and reenters the uterus, thereby getting a second shell applied.
The reason for the different color is that the pigment available in the uterus after shell formation was completed had been used up by the previous shell.
Somewhere I have a picture of a green egg inside a brown egg. That's because the blue pigment had already been used and unavailable for the next shell.
Rarer is for the egg to reverse enough to obtain a second yolk.

Thanks for posting.

 

[annabelle71]

It is not common but I lecture on it in some of my chicken classes.
Since it is so uncommon, it hasn't been widely studied.
It happens when an egg reverses in the oviduct and reenters the uterus, thereby getting a second shell applied.
The reason for the different color is that the pigment available in the uterus after shell formation was completed had been used up by the previous shell.
Somewhere I have a picture of a green egg inside a brown egg. That's because the blue pigment had already been used and unavailable for the next shell.
Rarer is for the egg to reverse enough to obtain a second yolk.

Thanks for posting.

Thanks so much for this information. So very interesting. Knowing what I know now I will be anxious to crack the egg open.

 

[aart]

Somewhere I have a picture of a green egg inside a brown egg. That's because the blue pigment had already been used and unavailable for the next shell.

That's interesting...would love to see the pics.
No blue at all in the second shell?

 

[ChickenCanoe]

That's interesting...would love to see the pics.
No blue at all in the second shell?

The outer shell was just brown. I think I know where the picture is, I'll look for it later and alert you when I post it.

 

[Deb Stanley]

View attachment 1806818

 

[Deb Stanley]

It is not common but I lecture on it in some of my chicken classes.
Since it is so uncommon, it hasn't been widely studied.
It happens when an egg reverses in the oviduct and reenters the uterus, thereby getting a second shell applied.
The reason for the different color is that the pigment available in the uterus after shell formation was completed had been used up by the previous shell.
Somewhere I have a picture of a green egg inside a brown egg. That's because the blue pigment had already been used and unavailable for the next shell.
Rarer is for the egg to reverse enough to obtain a second yolk.

Thanks for posting.