I do the same. Not enough of the other essential vitamins the chickens need. Corn is a good filler and good for helping them stay warmer during the cold weather. I give cracked corn and scratch grain as an occasional treat in their run to give them something to do during the snowy days when they're stuck indoors.And I do nearly the opposite. My birds get a layer feed or flockraiser feed all year-round and I avoid corn except in the winter. My waterfowl do have some corn in their feed, but it's only a small amount and only one of 7 grains in their feed.
The rich deep yellow color comes from beta carotene in the birds diet. Dark greens are high in beta carotene. It's for this reason that chickens allowed to free range on pasture have the darkest yellow yolks. Some other foods high in it are: sweet potatoes, carrots, butternut squash.Hummm... I am a complete novice but I understood that you have to feed cracked corn to them to get the awesome rich deep yellow yellow yolks and the wonderful flavor I am searching for in my eggs. Am I wrong on this? How much corn should I feed to keep them healthy yes still get the rich eggs? I hope there is a good solution!
Our flock free ranges on pasture all day long and the eggs have the darkest yolks I have ever seen. These are my first chickens. They also get fed whole corn, scratch & BOSS plus layer crumbles are always available. They are fluffy, (Cochins) shiny, and full of energy. The BLRW's look beautiful in the daylight their colors so enriched from the sun's rays. The nights are 20 degrees now and they live in an unheated coop. They peck bird seed from under the bird feeder all the time. They ate leftovers during the summer from the garden and ate the wild grapes running over the fences near our pond. I really don't think that anything most of us buy and feed our chickens is completely bad for them. If they were in the wilds nature would provide only certain foods for that season and climate. Just my novice thought.The rich deep yellow color comes from beta carotene in the birds diet. Dark greens are high in beta carotene. It's for this reason that chickens allowed to free range on pasture have the darkest yellow yolks. Some other foods high in it are: sweet potatoes, carrots, butternut squash.