If your potty-trained dog eliminates in your absence, it’s not to spite you or be vindictive about you leaving. It’s most likely because she feels panicked in your absence. In fact, that look on her face when you arrive back home is not remorse or guilt — it’s fear. She sees you’re angry at her and doesn’t understand why, since all she knows is that she has just been through an ordeal.
What’s needed in that instance is compassion, not anger.
