Welcome! My name isXXXXX am a UC Davis graduate, and currently, a Medical Director of a veterinary hospital.
I am sorry to hear about this concern for Rusty.
Definitely, the supportive care needs to be a bit stronger than just a shirt or the homeopathic remedies.
DAP diffuser – Release dog pheromone into the air and can help with stress. You cannot smell it:DAP Diffuser
Composure Liquid- another supplement that can sometimes be of some benefit for agitated or stressed pets.Composure Liquid
Rescue Remedy (another popular choice):Rescue Remedy
Now, I wanted to mention a few other supplements first, just in case, none of these have been considered.
By far, one of the most popular therapies to help with thumderstorm phobia is Xanax. Yes, the same xanax people take.
Information on Xanax:Xanax for Pets
You will see the reference within the link about its use for thunderstorm phobia.
I also like to make sure that the television or radio is turned loud, to help cover up some of the thunder sound.
Please let me know if there is anything I did not cover for you. I hope that information has been helpful.
Please remember to select Reply to Expert, if for any reason you need further clarification, have more questions, or were expecting a different type of answer. Please, hold off providing your feedback rating until you have asked all your questions.
Otherwise, I greatly appreciate your rating to close the question. My goal is to try and provide you the best answer possible.