Gizmo seems to be very skittish lately? I have no idea why? There has not been any type of change to what we do with him... he has always been around loud noises since he was little.... We take him to the races with us and LOVES it.... Is there something I can do to help him not be soo afraid? He is a all around very social dog.. He's almost 3 yrs old.. loves cats and dogs all sizes... and people.. especially kids.. we don't have any small children in the house it is just hubby and myself.. but it feels like as he gets older he has become more skiddish? Any ideas?