It was easy to answer this for Hannah, she is definitely a winter girl, which is why we sometimes refer to her as the Polar Dog. she loves the snow and the cold doesn't appear to bother her in the least. In summer she wilts. With Tucker it was a process of elimination. Snow too cold and too wet, NOT winter, spring brings the showers and wet grass, NOT spring. Summer is okay, but I think fall is his favorite. Just a hunch.