This reminds me that we rented a loft one summer on Martha's Vineyard in a house where they had a Vietnamese potbellied pig as a pet. Thankfully, the pig could not climb the stairs to our loft, but we had plenty of interactions with it throughout the summer. Definitely very smart and very stubborn.
The family had a nanny and the pig tortured her. One time it got her purse while she was out of the house and she came home to find all of the contents arranged on the floor, with all her photos organized together and displayed in a way that a serial killer might. That freaked her out real good and she quit a few weeks later.