Okay. I don't agree that they are not spiteful. I've ran into this a few times.. The first time was when my daughter was blowing a 'birthday horn' and I didn't even think that it would be bothering Louie. After a few minutes of her noisemaker, Louie jumped up on the couch a PEED ON MY FOOT
There was absolutely no other reason for him to do this, as he had NEVER done anything like that before... Especially on the couch... So, I do believe they're spiteful.. more recently, when we brought another Yorkie home, Louie wouldn't kiss me for 3 days... that was awful.