Django (my Cal King) was an absolute maniac last night after the storms rolled through my neck of the woods here in MA. He can be a bit high strung at times, but I can usually get him to calm down pretty quickly. Last night, I didn't even bother trying, he made it pretty clear he was in NO mood to chill.
They must be able to feel the change in atmospheric pressure, it would lend itself nicely to their survival. I know I can feel it in my geriatric bones. Between the arthritis (hands, shoulder, knees) the screws in my knees, and the metal rod in my leg, I always feel the storms. I cant imagine they dont feel it as well. And, I'm sure some feel it more than others and some react to it differently than others.