YOU SAID:

my dog ate my sisters food on my fathers birthday

INTO JAPANESE

私の犬は私の父の誕生日に私の姉妹の食べ物を食べました

BACK INTO ENGLISH

My dog ate my sister's food on my father's birthday

INTO JAPANESE

私の犬は私の父の誕生日に私の妹の食べ物を食べました

BACK INTO ENGLISH

My dog ate my sister's food on my father's birthday