For those of you with young pups, don't assume they will be afraid of the fireworks. My Edie was afraid of NOTHING when she was young. So, in my opinion, using drugs is not necessarily the way to go unless you know they will have a problem.
Mike is right....distracting them is the way to go. Edie is very afraid of thunder, but if I start playing ball with her, she is ready to go, and she forgets all about the thunder.
