When you lead her, make sure the collar is right behind her head, if its down on her neck, it can cause lack of control on your part, plus, choke her. If she pulls alot,
you might do better with a goat halter- that way, no pulling on her neck/throat, and where the head goes, the body follows!
Try and pull any of the fox tail out, as you feed. That is not good, the stickers can cause cheek abscesses and they can get caught in the throats. Famacha scores are a good
tool, for Barber Pole worms, but it is only one part of an entire array of different things to look for in too many parasites. Lung worms will not show up in a famacha test. During cold
weather months, most parasites do not lay eggs, as their young would have a poor chance of survival in the outside environment. So, you goat could be wormy, but no eggs are
showing up on the fecal tests. Barber Pole worms suck blood (causing anemia and showing up as pale eyelids) but only lay eggs at certain times, other worms cause other problems.
So, basically, you have to use fecal tests, famacha test, over all body scoring, etc. to find out if you have too many parasites in your goat. (there will always be some- you don't want too many)
All that said, she may just be overly sensitive to dusty hay, may have allergies, or she may have a cold or lungworms.