YOU SAID:

My dog is locked in a cage with my little brother.

INTO JAPANESE

私の犬は私の弟とケージに閉じ込められています。

BACK INTO ENGLISH

My dog ​​is trapped in a cage with my brother.

INTO JAPANESE

私の犬は私の兄と一緒にケージに閉じ込められています。

BACK INTO ENGLISH

My dog ​​is caught in my cage with my older brother.

INTO JAPANESE

私の犬は私の兄と一緒に私のケージに捕らえられています。

BACK INTO ENGLISH

My dog ​​is caught in my cage with my older brother.