Every face change starts with the old face squashing into a near-blink. The new face springs past full size, then settles. Use Slow to see it.
At the table the camera looks down on the heads and mouths hide under snouts. There the eyes, brows, colors (gold, red, blue) and marks over the head do the work. Check with Table size.
Resting faces stay the ones you approved. Only the expressions get bigger.
The penguin, capybara, duck, frog and horse models are still changing, so their faces will be refitted when the models land.