Does anyones dog not eat when its storming?

i just got a 15yr old dog and today when we work up it was thundering and lighting really bad she greeted me with her normal wagging tail but now she is just sitting on the couch watching my other two walking around and eating but she wont move or eat. i know she is old and everything but yesterday she was fine and again i know with any dog espically the old ones things can change fast i was just wondering if anyone else had this problem she is a carnie terrier