YOU SAID:

I once killed a cat with a gallon of bleach

INTO JAPANESE

私は一度漂白剤のガロンと猫を殺した

BACK INTO ENGLISH

I once killed a gallon of bleach and cats

INTO JAPANESE

私は一度漂白剤や猫のガロンを殺した

BACK INTO ENGLISH

I once killed a gallon of bleach and cats