YOU SAID:

i went to a park yesterday and screamed at an old dog

INTO JAPANESE

昨日公園に行って老犬に向かって叫びました

BACK INTO ENGLISH

I went to the park yesterday and screamed at my old dog.

INTO JAPANESE

昨日公園に行って、老犬に向かって叫びました。

BACK INTO ENGLISH

I went to the park yesterday and screamed at my old dog.