A Born-Lycanthrope’s transformation, when studied by healers, has been proven to not work, magically, the same way as Turned-Lycanthropes. Where a Turned Wolf’s transformation can be equated to a transfiguration charm, similar to animagi, a Born-Lycanthropes transformation is more accurately described as a Skele-Gro potion with pain comparable, or worse, than a Cruciatus curse.