YOU SAID:

Dog has a big fat balloon

INTO JAPANESE

犬は大きな太い気球を持っています

BACK INTO ENGLISH

The dog has a big thick balloon

INTO JAPANESE

犬は大きな太い風船を持っています

BACK INTO ENGLISH

Dog has big, big balloon

INTO JAPANESE

犬は大きくて大きな風船を持っています

BACK INTO ENGLISH

Dogs have big and big balloons

INTO JAPANESE

犬は大きくて大きな風船を持っている

BACK INTO ENGLISH

Dogs have big and big balloons