Poultry > Youth & 4-H
CaCO3 is used in most laying hen feed and broiler and turkey breeder feed. I would suggest to contact the United Egg Producers, Midwest Poultry Federation and U.S. Poultry & Egg Association as well as American Feed Industry Association. You can look these up on line. You might also send an email to Kevin Vinchattle (515-727-4701, ext. 13) at Iowa Egg Association and Dr. Christian Bregandahl (515-294-5132) and ask your question to them.
Ken Koelkebeck Extension Specialist, Poultry
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