Bunny Dundee

From the collection Dreamin’ Dreams; A funny short story in 3,300 words.
The donkey was mad. We all knew that. You only had to look at the cut of it. It stood to reason, of course, that an animal like that would have an owner who would be every bit as odd. And Bunny Dundee was as odd as you could get.
Then Bunny gets a letter ..