Armour isn't the only natural thyroid
med. I have, too, heard that Armour
levels can be unreliable, but only from endos, and not from actual Armour patients. I haven't heard anything negative about Armour on this forum, except that they recently changed their formula and some people were reacting to the fillers.
Compounding pharmacies can mix the amount you need, so if she's getting too much of one or the other, she can adjust.