Thanks to my friends at TiqIQ for this. They say:
mini donkeys and dogs at @bigapplecircus
Since PSAMP has come back from hiatus, we’ve been all about awesome animals riding other animals (1, 2), so why not continue the trend with dogs and mini donkeys as well?
This isn’t an ad, but remember to use TiqIQ for your ticket needs. I love them and they are my favorite. And they send me pictures of great dogs on mini donkeys.