I found this 10 year old post but unfortunately the OP hasn't been on here for a decade! Can anyone tell me more about this? I think it's fascinating.
The thread was talking about why a yellow legged hen's legs start to fade....
Here is an answer someone posted :
"This is a process called 'Bleaching' - it is very useful in determining how lazy of a layer your hen is. If you raise a yellow-skinned breed, you can sort out he less productive hens by the color of their skin after they have been laying a while. The same pigment that makes egg yolk yellow colors the skin of the yellow skinned breeds. When a hen starts laying, the skin of her various body parts bleaches out in a certain order. When she stops laying, the color returns in reverse order. You can therefore tell how long a yellow skinned hen has been laying, or how long ago she stopped laying, by the color of the exposed skin on her beak and legs."
The thread was talking about why a yellow legged hen's legs start to fade....
Here is an answer someone posted :
"This is a process called 'Bleaching' - it is very useful in determining how lazy of a layer your hen is. If you raise a yellow-skinned breed, you can sort out he less productive hens by the color of their skin after they have been laying a while. The same pigment that makes egg yolk yellow colors the skin of the yellow skinned breeds. When a hen starts laying, the skin of her various body parts bleaches out in a certain order. When she stops laying, the color returns in reverse order. You can therefore tell how long a yellow skinned hen has been laying, or how long ago she stopped laying, by the color of the exposed skin on her beak and legs."