Hello everyone, I too am glad I found this post as I was about to post something similar. My chickens are 10 months old as well, and their eggs were anywhere from a light brown to a light chocolate. But now all of a sudden they are mostly a cream color and a few light browns. I also have 1 white leghorn and 2 EE's and those eggs are of course not affected. But I should mention that first they stopped eating their crumbles almost completly. I thought maybe they had gotten tired of the crumbles so I tried giving them pellets. Nope, didn't help. Then I tried a different brand. Again, didn't help. All this time I was feeding them greens and mealworms and they had no interestin their food at all. Then I read in a post about giving it to them wet instead of dry, so I tried it (I even put some mealworms in it to make sure they ate it) and sure enough, they went to town on it! But little by little they started loosing interest on it as well, except for the mealworms. The little stinkers would pick out the worms (and even get in and scratch through the mush to find the last one) and leave the food. They then only pick at it a little bit here and there. Then something happened which made me realized that they were not getting the right nutrition. One of them started limping and I thought maybe she had bumblefoot, but after checking her carefully, I realize that was not the case. So I took her to a vet, but not an avian vet. Still she saw that by this time she was walking on her elbows(?) and her toes were curled downwards. So she told me she felt it was a neurological problem probably brought on by a vitamin deficiency. So she went to check on a book and came back and said that B2 deficiency causes this problem and that I needed to give her a good dose (100mcg) daily. So, I started giving her polyvisol, but I had added selenium and vit E to it for another chicken and I didn't want to overdose her on the selenium. So instead, I started feeding her a hard boiled egg a day and some spinach. She seems to be improving. We also gave some vitamins to the other chickens, thinking that they too might be deficient in something. But we stopped before too long because the vitamins I bought had electrolytes and I read you're not supposed to give them electrolytes unless they really need them an not for very long. So... after this whole epistle, I wonder if any if what we did might have caused the change in egg color? Btw, they are also plucking each other. Every day I see another plucked chicken, some are pretty bad and some just barely noticable. And they keep their moths open. (I'm a new chicken mama) I don't know for sure what that means. HELP!!!