Hi, there. We have a 10-year-old yellow lab. We got her at 8 as a rescue. I didn't notice this early on, but she now jumps like she's been shot at the smallest sound (setting my coffee cup down, for example). Oddly, although she isn't thrilled with thunder or fireworks, she isnt overly fearful, either. It's any small noise. If I am in the kitchen, she invariably leaves and goes in the bedroom, because it's too noisy and there is too much activity. She has had full vet workups and is perfectly healthy, though stiffening up a bit. She gets regular exercise. Any thoughts or suggestions? Thanks so much.