ThunderShirt Anxiety & Calming Aid for Dogs, Pink PoloDescription Thundershirt uses gentle hugging to calm your dog. With its patented design, Thundershirts gentle, constant pressure has a dramatic calming effect for most dogs if they are anxious, fearful or overexcited. Based on surveys completed by over two thousand customers, over 80% of dogs show significant improvement in symptoms when using Thundershirt. Thundershirt is already helping hundreds of thousands of dogs around the world and is