Thundershirt is the best solution for dog anxiety and has helped thousands of dogs. Safe, gentle and drug free. Recommended by vets and trainers around the world, Thundershirt’s gentle, constant pressure is a solution for many types of dog anxiety, fearfulness, barking and more, including fear of thunder or fireworks. Thundershirt is like a giant wearable hug that never ends. If Thundershirt doesn’t work for your dog, just return it for a refund of your purchase price. 100% satisfaction guaranteed.