YOU SAID:

My friend and my dog went out today and bit a ducks dog tail.

INTO JAPANESE

友達と犬は今日外出して犬の尻尾を噛んだ

BACK INTO ENGLISH

My friend and the dog went out today and bit the dog's tail.

INTO JAPANESE

友人と犬は今日外出して犬の尾を噛んだ。

BACK INTO ENGLISH

My friend and the dog went out today and bit the dog's tail.