YOU SAID:

it is raining dog and cats

INTO JAPANESE

犬や猫を雨が降って

BACK INTO ENGLISH

It's raining dogs and cats.

INTO JAPANESE

犬や猫は雨です。

BACK INTO ENGLISH

It's raining cats and dogs.

INTO JAPANESE

バケツをひっくり返したような雨だ。

BACK INTO ENGLISH

It's raining cats and dogs.