Thanks! Will try to pat the dog more next time out. I think sometimes I use the wrist to compensate for bad bounces, which are not uncommon on these gritty shell courts. Also sometimes when I try to really lay the wrist back I end up exaggerating it and not having any internal shoulder rotation. I suppose repetition will improve it.
It's really hard to keep the left arm up. Like a deep deep muscle memory, along with catching the racquet.