YOU SAID:

Dogs are the fluffiest things in the world, next to my cat.

INTO JAPANESE

犬は私の猫の隣に、世界で最もふかふかのものです。

BACK INTO ENGLISH

The dog is the softest thing in the world next to my cat.

INTO JAPANESE

犬は私の猫の隣にある世界で最も柔らかいものです。

BACK INTO ENGLISH

The dog is the softest thing in the world next to my cat.