Do NOT shoot over your dog again!!!!!! Something has happened to make him like this and it's a gradual process to correct it; It can be corrected with time.
Start as if you've got a pup again...at the food bowl
While he's eating, clap your hands to start. Do that a few times and ANY TIME HE SPOOKS Love'em up real good. Do this until he no longer spooks or when you clap he comes to you.

Graduate to louder noises i.e. pots and pans banging and after a while try sneaking up on him a little. The idea is to get him to realize "loud unexpected noises are GREAT!"

No offense, Valcorie, But that sounds like a sure fire way to make a gun shy dog crazy.

Trushot }}------>