Couldn't resist this because I have a GSP too! You have described their character perfectly in your story, mischievous but also incredibly loving. I love your story. It describes perfectly life from a dog's point of view. You have managed to get into Liebling’s head incredibly well. You have also managed to get a huge amount of emotion in the story, despite it being told from a dog's perspective. The bit where tears fell on Liebling’s fur nearly made me cry.