YOU SAID:
My cat is fat and needs to go to the doctor.
INTO JAPANESE
私の猫は脂肪を医者に行く必要があります。
BACK INTO ENGLISH
My cat fat to go to the doctor.
INTO JAPANESE
医者に行くに私の猫の脂肪。
BACK INTO ENGLISH
To go to the doctor my cat fat.
INTO JAPANESE
私の脂肪を猫医者に行く。
BACK INTO ENGLISH
My fat cat doctor!
INTO JAPANESE
デブ猫医者!
BACK INTO ENGLISH
Fat cat doctor!
INTO JAPANESE
脂肪猫ドクター!
BACK INTO ENGLISH
Fat cat doctor!
That didn't even make that much sense in English.