I have a 2 year old golden retriver who was one heck of a dog last yearbut all of a sudden this year he got real gun shy. He was fine during the early goose season but 3 weeks I had some watch him while I was on vaction. Now he is scared of the gun shot and scared of the gun if he sees a gun he cowers and runs away. Has anyone else experienced this with a dog and broke him of it? Thanks