I'm sorry I didn't clarify; my "herd" is just the three goats: My 4 yr old doe, her 3 yr old wether, and the goat in question (4 yr old "special" doe; has always had mental development problems and a 'dwarf' conformation....I call her my "downs syndrome goat").
The normal 4 yr old doe and her son have been shedding themselves on trees and the fence, etc, and seem to be going through what I would consider a "proper" summertime switch from winter haircoats to summer haircoats, but YES, they all 3 did seem to have that "crispy", split-end hair this winter; which is why I examined my minerals closely and made the switch.
The little "special" doe was a bottle-baby, so she is much more in-my-face and I am able to pet and handle her at will (the others are stand-offish, but I do not see the large dandruff flaking. Also, their shedded-out areas are sleek and summer-coat-normal, whereas the special goat's "summer coat" is SO THIN and barely there).
I looked VERY carefully, and it is not presenting like mange or mites (from what I know of those from dogs). I also had fecals done prior to my move about 13 months ago; vet said all three were in very acceptable range and to "keep doing what you're doing" (moxidectin 2x per year).
My HOPE was that after switching to proper minerals that this type of shedding was to be expected....

and that I should just continue to groom her and she'll even out on her own......I will get the tag information off the bag in the morning.