If you didn't do it - you're not guilty. All the behaviours are related to someone being mad at you or just generally upset. I can't handle angry people at all. I sort of implode or go in on myself. It's more related to fear and appeasement than guilt. And I imagine it's much the same with the dog. They've got no idea why you're upset, but they really feel uncomfortable about it.
LOL I love angry people. I really enjoy a good fight.
I am talking I actually feel guilty, as in in my mind I even think "Hmm did i?" even though I know I didn't. It's hard to explain.