"我的狗在哪儿？"

Translation: Where is my dog?

[snipegavain]

Chinese John Wick's most used question.

[CarlCampbell]

Not a question I look forward to using 0_0

[Saisai11]

哪儿 - more often in the northern part of China
哪里 - more often in the southern part of China

[scrubb2000]

Why 哪兒 and not 哪裡?

[shuaiscott]

Both are correct. 哪兒 is typically mainland Chinese, 哪裡 is typically Taiwan Chinese

[Zhende1114]

Not necessarily. 哪里 is also used in the south in mainland China.

[TellTheSeal]

Maybe that's why shuaiscott said "typically."

[adz001]

It is also used in Singapore

[Keith_APP]

Both are correct.