YOU SAID:

I smiled at the horse and the horse smiled back.

INTO JAPANESE

私が馬に微笑むと、馬は微笑み返した。

BACK INTO ENGLISH

When I smiled at the horse, the horse smiled back.

INTO JAPANESE

私が馬に微笑むと、馬は微笑み返した。

BACK INTO ENGLISH

When I smiled at the horse, the horse smiled back.