Our hen's (variety of breeds) are having problems with their paint shop. They are normally brown egg layers, nice brown color. Then they started laying eggs that looked liked someone spray painted them with brown, now they are laying almost white eggs. Any suggestions? What could they be missing, they get lay crumbles mixed with a flockraiser, free grit/crushed shells, bugs, scraps, fresh grasses, and scratch everyday. Any suggestions? Some hens are still laying brown eggs, but 3 have converted to white. Shell's are nice and no issues with fertility or any other observation.