YOU SAID:

I ate my brothers dog

INTO JAPANESE

私は私の兄弟犬を食べました

BACK INTO ENGLISH

I ate my brother dog

INTO JAPANESE

私は兄の犬を食べました

BACK INTO ENGLISH

I ate my brother's dog

INTO JAPANESE

私は兄の犬を食べました

BACK INTO ENGLISH

I ate my brother's dog