What it is...

In answer to yesterday's post, no, it is not a mule. 

This is a mule:

Here's a hint. This picture was taken seconds after the one in question:

Now do you know?

If you still can't get it, it is, (or rather, she is):

Perla.

Our pretty, curious, and normally not at all mule-like-looking, little pony. :)

Thanks Lizzy, for capturing the cute picture and thanks you guys, for guessing along!