Would Vicissitude alone be enough to produce flying animal ghouls?

I’m running a Dark Ages campaign and one of the players is a young Tzimisce vampire, left in service of Gutka in Poland. While there, he decided to invent winged hussars several hundred years early, but instead of winging the hussar, he’d prefer to use Vicissitude III to shape horses into wing-bearing, flight-capable death cavalry machines, ghouled to their rider. Extra armour in bone included.

To me, this seems incredibly cool, yet I cannot see whether such proficiency in Vicissitude actually allows such a feat.