YOU SAID:
Jack ate his old cow John.
INTO JAPANESE
ジャックは年老いた牛のジョンを食べてしまいました。
BACK INTO ENGLISH
Jack ate old cow John.
INTO JAPANESE
ジャックは老牛のジョンを食べました。
BACK INTO ENGLISH
Jack ate old cow John.
That didn't even make that much sense in English.