Wear or don't wear shoes?

[floramon]

Why some anime/cartoon animals wear shoe, but some don't?

Example, Zootopia all animals wear shoes. Beastars (comic) also wear shoes.

But The King of Beast and the Princess of Sacrifice (comic) all animals don't wear shoes. Kung Fu Panda also don't wear shoes.

Micky Mouse wear shoes, but Donald Duck.

In Zootopia and Beastars, it is weird to see a huge animal wear shoes, such as elephant, crocodile and etc.

I am sure that their shoe shop is extra large, because need more space to put extra large shoes.