When Lela was a pup, at the end of the day she could work herself into a real frenzy, running around the house, not able to stop. A real B500 and then some.
Nothing worked to stop or quiet her. Then, one time, I intuitively picked her up, and squeezed her tight in my arms against my body: she instantly went limp, offer a few movements with her paws and jaws and then would collaps into a fine, long coma. I have done it many times, and it worked like a charm.
So, pressure seems to help - that's what a thunder shirt would do, I guess.
M