For those, who want their cat look more "fluffy", I have created Fat Cats Addon!
This pack increases cat's body height by two pixels and its width twice (!)
Cats have same speed, hitbox and everything. This pack works with every stable version of Minecraft Bedrock Edition. I'm not sure about latest betas, as I haven't tested this addon on them, but you can try to install it, if anything is wrong with the pack report in comments.
The addon is very light (56 kilobytes), but it has a lot of fat!
I hope you enjoy it!
Select version for changelog:
Changelog
I've added my inspiration and software I used in the description