My hay has 62 ppm iron and 85 ppm manganese. At 22 lbs of hay that put her at: 620 mg Fe, 60 mg Cu, 170 Zn, and 850 Mg. With her CA Trace Plus it brings her Mg to Zn to just under 1:1 and her Zn to Cu to 3:1 (with a 1/4 tsp extra Zn), but the FE to Cu ratio drops to 1.7:1.

I’ve never had hay this low so I guess it’s fine for now. I do all my own blood pulls. I’ll look into maybe sending a sample to KSU next time I pull any blood. 
--
- Anthie

Northern California
August 2015

Eric's case history: 
https://ecir.groups.io/g/CaseHistory/files/Anthie%20and%20Erin/Erin%20Case%20History%208-19-20.pdf