Thank you for the info on cobalt, I suppose that is why it is offered so for the horses.  I will continue to have both available for my horse to choose from and include iodized table salt with her feed.
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Kandace K
Rocky Mountains, Alberta, Oct 2020
https://ecir.groups.io/g/CaseHistory/files/Kandace%20J%20and%20K
https://ecir.groups.io/g/CaseHistory/album?id=259062