I don't think ALL Tuckers is non GMO. They have non GMO available. Edwards has pullet grower and broiler starter those shouldn't have much if any calcium. I would think ALL feed would have some calcium....they probably need small amounts to keep bones strong. BUT I am no help with non GMO feed. I don't use it.
You are correct about Tuckers having a non-GMO option, but everything they make is not non-GMO. All I was trying to do was let rjohns39 know there are some other options, locally available in their new location in Smith Co, to get something close to what they had in VA. As for the free choice calcium VS calcium in the feed question, there are numerous references on the internet to the calcium needs of laying hens and roosters. Personally, I use non-added calcium feed, non- GMO products and free choice oyster shell. So glad we have choices!
SFH, Isabelle leghorns and lovely Silverudd Blue (formerly called Blue Isbar)
-Silver Ameraucana, Queen Silvia and East Frisian Gull. Eggs fall 2016.
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VA Poultry Approval #213