Your Petit Basset Griffon Vendéen was bred to follow of the trail of rabbits or hares through the Vendéen of France. Low slung, they could easily trail through the thickest of bramble.
Even with such a Let's Do This Thing Vibe your PBGV may still be terrified of thunder, fireworks or gunshot. Let thunder boom or fireworks explode and your PBGV is shaking and trying to climb into your lap.
Just as certain triggers cause terror in people (public speaking, spiders, snakes, heights, clowns), our dogs can also have fear triggers. Thunder, fireworks or being alone are all common triggers for our dogs.