The only way to really know how much iron the horse is getting is to test your hay,
and also calculate whats in your supplements and grain (water too would be good if
you see a rusty ring in your sinks!)
If you want to test your hay for the macro & micro-minerals use www.litchlab.com
Litchfield Analytical Services... get test T4 for horses (no lab I know of
does selenium ) but this'll give you the complete mineral profile on
your hay for about $28.00
 
For hair analysis www.uckele.com
This ain't cheap at $110.00.

Barb

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