YOU SAID:

a cat ate no dog food because he was stupid

INTO JAPANESE

猫は馬鹿だったのでドッグフードを食べなかった

BACK INTO ENGLISH

Cats were stupid, so they didn't eat dog food.

INTO JAPANESE

猫は馬鹿だったので、ドッグフードは食べなかった。

BACK INTO ENGLISH

Because the cat was a fool, he did not eat dog food.

INTO JAPANESE

その猫は馬鹿だったので、ドッグフードを食べなかった。

BACK INTO ENGLISH

The cat was stupid, so he didn't eat dog food.

INTO JAPANESE

その猫は馬鹿だったので、ドッグフードを食べなかった。

BACK INTO ENGLISH

The cat was stupid, so he didn't eat dog food.