Ba-Bawk!
The eyes are a crucial part of distinguishing the human body from other living creatures. Things like body mass, walking style, height, voice, head shape, and facial characteristics are all factors that can help identify a person, but it’s the eyes that play a key role.
This is why it can be challenging to identify someone wearing sunglasses that cover their eyes. This could be the reason the toddler’s expression appears so scary, as her eyes shift from those of a human to those of a chicken and vice versa.