The dragons noticed first, which was surprising, they turned their more powerful breaths, teeth and claws against the Valyrian Zombies but they would just revive of course. The dragons, and riders, some of whom had been lost, were faced with a tough decision.
In the end, they rounded up all the dead and placed them into an abandoned holdfast, barred the gate and placed dragons atop the walls. Should any of the Zombies attempt to escape, they would find themselves torn apart by runes from the Riders and breath weapons from the dragons but who knew how long this would last?