We only have one that is afraid of loud noises - our middle one.
neighbor likes to shoot out back of his property, the guard jets flying over after practice, fireworks, thunder.

she's getting worse too this 4th of July we had her in the back porch while we were gone. came back to let her out and she had torn the trim boards off the house door-trying to get in.
I think we have to get doggy tranquilizers for next year.