Bears bother me. Why are Xiong Er's eyes big?

Bears bother me. I am ambitious. Xiong Er's eyes are big because they are Kazilan's eyes. "Bear's Companion, My Bear's Core" Xiong Er's Kazilan has big eyes, and their looks are not much different from those when they grow up. The biggest difference between them except their coat color should be their appearance. Judging from the five senses, Xiong Dahe Xiong Er's pupils are green and his eyes are black.