Shattered Kingdoms

I have a question (obviously). When a NPC gets a natural weapon-style attack--i.e., a slashing attack, like at at the Borderland Keep, does parry work on that attack, even though the NPC isn't using a weapon? Thanks.

Pretty sure that only enhanced parry works with that (And if it does succeed, it gives the one parrying a free attack on the attacking limb as well)

Basic parry will not parry non-parry weapons and natural attacks including claws.
Enhanced Parry will parry non-parry weapons and against natural attacks will also damage the limb along with the parry.