“She’s more than twice as tall as a pony, so she probably weighs at least twice as much.  Twenty drams is a good place to start.  I guess we’ll have to just observe and see if it’s taking effect.  I hope it does; Zecora’s supposed to be here soon with a potion which might fix her hand.  Dr. Stable and I discussed her case all night.  Both of them seem not only resistant to magic, but strong spells seem to hurt them somehow.  In the stallion’s case, his injuries don’t seem too life-threatening, so we can move slowly.  But the mare—her hand is badly burned.  If Zecora’s potion doesn’t work, the doctor and I will have to amputate.”  