I have quoted my source often. An independent poultry feed and nutrition expert quoted in Harvey Ussery's book, The Small Scale Poultry Flock. I accept the knowledge and expertise of this independent expert over any info fed to us by the feed manufacturers. As for feed working or not working for customers, how many threads are dedicated to folks with woes about feather picking and blood shed in their flocks? How many threads dedicated to chicks with wry neck, crooked toes, and other issues? Do a search related to congenital abnormalities, and one of the primary causes cited is malnutrition in the breeder stock. I'm on my way to work, so don't have time to cite my source for yet the umpteenth time, but the info is there if any one cares to do a thread search for it. I have bolded the words which should locate my previous posts.