TM salt blocks

[Joie Rowles <Rowles.Joie@mayo.edu>]

I recently received the Nov issue of Horse Journal.  In it they say that
red, trace-mineralized salt blocks and not the best answer to supply trace
minerals to horses.  They indicate that these are designed for cattle and
other ruminents, not horses. They also say that some levels of minerals are
too high and others are too low, and this could possibly lead to
interference in absorption of correct amount of minerals from an
equine-formulated supplement if you are also giving that.  Their
recommendation is to stick to plain salt and use an equine TM supplement.
I was surprised to read this; my mare always has access to a red salt
block.  What do you guys think??

Joie Rowles
Arizona