YOU SAID:

my dog is a cat and my cat is a dog.

INTO JAPANESE

私の犬は、猫と猫は犬。

BACK INTO ENGLISH

My dog, cat and cat's dog.

INTO JAPANESE

私の犬、猫、猫の犬。

BACK INTO ENGLISH

My dog, cat, cats, dog.

INTO JAPANESE

私の犬、猫、猫、犬。

BACK INTO ENGLISH

My dog, cat, cats, dog.