Just do not warry. I am aware of two similar cases. And in both, emotional health in the long run improved and trauma disappeared without dog psychologist help. One of the dog was found in the woods, affraid to come in to the village, as some children apparently were throwing stones at him. He was seen for ten days moving around alone. Can you imagine his ordeal?
I am sure that your love will heal Princess. She will become queen of your Ritz. Just be patient with her.