YOU SAID:

my cat is fat and needs to stop overeating

INTO JAPANESE

私の猫は太っており、食べ過ぎを止める必要がある

BACK INTO ENGLISH

My cat is fat and needs to stop eating too much

INTO JAPANESE

私の猫は太っているので食べ過ぎる必要があります

BACK INTO ENGLISH

My cat is overweight and needs to eat too much

INTO JAPANESE

私の猫は太りすぎで、食べ過ぎる必要があります

BACK INTO ENGLISH

My cat is overweight and needs to eat too much