I'm going to assume you've given the chao some small animals, perhaps a lion. When chao are given small animals, they retain animal parts and gain stat points. You can read all about small animals on the main website. Unfortunately, you cannot remove these parts, but they can be changed with other ...

so, i just bought SA1 for my Dreamcast, and my Chao looks kinda different from on the website. it looks like a normal/normal Chao (i think, im new to Chao stuff) but it has cat paws on its feet and hands? what does this mean? i cant find this anywhere on the site (at least the SA1 Dreamcast section)