Thundershirt is an excellent treatment for most types of dog anxiety and fear issues.  Over 80% of dogs show significant improvement in symptoms when using Thundershirt. Dr. Temple Grandin believes that pressure has a calming effect on the nervous system. Thundershirt’s gentle, constant pressure has a terrific calming effect. Thundershirt is also a very useful tool for managing excitability or hyperactivity with strangers, on the leash, or in a training environment. Thundershirt’s calming effect helps a dog to focus (or refocus) his or her energies in a more constructive direction, allowing training to be more effective.