YOU SAID:

She had a mouth, i had a dog

INTO JAPANESE

彼女は口を持っていた、犬をしていた

BACK INTO ENGLISH

She had a dog had a mouth,

INTO JAPANESE

彼女、犬の口を持っていた

BACK INTO ENGLISH

She had a dog's mouth

INTO JAPANESE

彼女は犬の口を持っていた

BACK INTO ENGLISH

She had a dog's mouth