Our dog has had this problem from birth - fireworks and thunder made her so upset. She would get into a closet and rearrange the whole thing. Now she is very hard of hearing and all is fine! There are blessings in aging! Nothing worked for her. But I was told to turn music up REAL LOUD and that helps drown out the noise that bothers them...we tried it, but we couldn't stand it! Might be a good idea if you have to leave them alone.