What is the poem a dogs mistake about?

There is no widely known poem titled "A Dog's Mistake." It's possible that you may be thinking of a different poem or title, or perhaps it's a lesser-known poem.

To help me find the poem you're looking for, could you provide any further details? For example:

* Do you remember any lines from the poem?

* What is the overall theme or subject matter?

* Who might have written it?

With more information, I can better assist you in finding the correct poem.