Same with Logan. She'll pace and pant or stand perfectly still, like in a trance, looking at the ceiling. Same thing with firecrackers. I don't coddle her or try to hug her at all. I try to distract her with a toy or rawhide bone. Depending how bad the storm is, she found her own safe haven at the bottom of the family room steps against a wall. If you pet Casey or try to console her, she will interpret that as "it's OK to shake and be scared". It breaks my heart, but I just let Logan deal with it on her own and she's always been fine afterwards.