YOU SAID:
My nephew is petting our adorable elderly puppy
INTO JAPANESE
私の甥は私たちの愛らしい年配の子犬をかわいがっています
BACK INTO ENGLISH
My nephew is petting our adorable older puppy
INTO JAPANESE
私の甥は私たちの愛らしい年上の子犬をかわいがっています
BACK INTO ENGLISH
My nephew is petting our adorable older puppy
That didn't even make that much sense in English.