The main Infos about the facial are on the Head bone

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Through the dedicated attributs, you can

Squahs n Stretch and head deformation

use this two objects : FCL_upHead, FCL_head_bend

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The Eyes

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Move the eyes though the objects dedicated.

on FCL_eye_L/_R you will find the ‘sticky’ what makes the eyelid moving a bit, and the control of the pupil and iris

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The beak