YOU SAID:

my cow ate my horse and my horse ate my dog and my dog ate my cat and my cat ate my mouse.

INTO JAPANESE

私の牛を食べた私の馬と私の馬が私の犬を食べたと私の犬を食べた私の猫と私の猫は私のマウスを食べた。

BACK INTO ENGLISH

Ate my dog ate my dog ate my cows, my horses and my horses and my cat and my cat ate my mouse.

INTO JAPANESE

私の犬は私の犬を食べた食べた食べた私の牛、私の馬と私の馬と私の猫と私の猫は私のマウスを食べた。

BACK INTO ENGLISH

My dog is my dog ate ate ate my cows, my horse, my horse and my cat and my cat ate my mouse.

INTO JAPANESE

私の犬は私の犬を食べた食べた私の牛を食べて、私の馬、私の馬と私の猫と私の猫は私のマウスを食べた。

BACK INTO ENGLISH

My dog ate my dog ate my beef, my horse, my horse and my cat and my cat ate my mouse.

INTO JAPANESE

私の犬は私の犬を食べた私の牛肉を食べた、私の馬、私の馬と私の猫と私の猫は私のマウスを食べた。

BACK INTO ENGLISH

My dog ate my dog ate my beef, my horse, my horse and my cat and my cat ate my mouse.