All three of our mares are losing hair in clumps on their lower hind legs. It feels all lumpy and when it's picked at, the dry skin a hair falls out really easily. Also, my mare has a 'lumpy' (
) spot on her neck that I have to scrub all of the dry skin out of but the hair stays there... She's also getting it on her face but it's bald when I pull it off with new hairs growing in. I've been using Eqyss micro tek spray after I gave her a bath and I've used up the whole bottle and it's coming back.. Help?