Re: yolk color in winter
My flock free ranges as a mixed group in winter in my large orchard. I notice that some breeds maintain a bright yellow yolk while others may decrease in yolk color. I think I have noticed a correlation between yolk color and how hard the breed forages. My Welsummers will always chose wild food over my feed......whether it is FF, organic layer, or anything that looks processed. They work hard at foraging in winter.......I see them find fat grubs as they vigorously work in the longer grass around my apple trees. They also tirelessly work the fence lines, which have high stands of grass that went to seed last summer. They never go to bed hungry yet seem to eat less feed than the other breeds. And they are laying strongly right now and the yolks are gorgeous, stand up orange. My sweet little Ameraucanas, on the other hand, love handouts and while they do forage pretty well they seem to more eagerly stock up on the FF and organic layer pellets. Their yolks are paler in comparison. Everyone also gets worms occasionally from my vermicomposting efforts and has access to graze cover crops of rye grass/clover/vetch. But the Wellies will be out foraging no matter the weather, while the Ams and EEs will be found sunbathing in the winter sun or napping in the coop.
All of the yolks will brighten up in warmer weather.....but I wonder if the aggressive foraging for wild food that the Welsummers keep at all year is part of the reason why their eggs stay bright and vibrant. I am really impressed with the breed.