Backstory! Willow was just strutting around the house, then she saw that furball again...The dog. She hissed at it, fur bristling up. She slapped the dog in the nose (After it barked rapidly at her). Then the owner threw her out and made her sleep in the rain.. :( (Gah lazy backstory..)
Credit to Merlp She doesn't know what's wrong cause she was defending herself..