Nutrena Nature Wise Layer Feed gives nice, dark, golden yolks & strong shells, but letting them eat grass, bugs, etc makes them even better. I sometimes switch to a cheaper brand in spring, but I notice my hens don't eat enough oyster shell on their own. I prefer strong shells. Although Country Feeds is also made by Nutrena, I have found that my birds just do better on the NatureWise. I've never been able to find Layena, so I can't comment on that brand.Are those from dom eggs? If so, how did you get those nice dark orange yolks? I've heard people say to use purina layena feed, however I'm on my second bag of it and my eggs are still pale yellow. Thanks.