YOU SAID:

I dumped in the backyard with my pet dog

INTO JAPANESE

私は私のペットの犬と一緒に裏庭に捨てた

BACK INTO ENGLISH

I threw it in my backyard with my pet dog

INTO JAPANESE

私は私のペットの犬と一緒に私の裏庭にそれを投げました

BACK INTO ENGLISH

I threw it in my backyard with my pet dog