One of my little dogs gets nervous when there's thunder. We adopted him when he was four, so we don't know if it's a result of some sort of trauma or if he was always like this. He doesn't do anything crazy, but he does tremble a bit and sits by closed the bedroom door, even when we're not in there. I searched for something besides a Thundershirt, or pheromones (we've tried them) and found this video. We're expecting more rain later this week, so I'll try it and let you know what happens!