YOU SAID:
My cat is dead My dog is dead
INTO JAPANESE
私の猫は私の犬が死んで死んでいます
BACK INTO ENGLISH
My cat is dead is dead my dog
INTO JAPANESE
私の猫が死んは私の犬死んでいます
BACK INTO ENGLISH
My cat is dead is dead my dog
That didn't even make that much sense in English.