@krazytoo100 hearing and sight tests sound like the way to go. I have a skittish boy who is very confident in his environment but freaks out easily about little things. He hates loud noises and used to be bad on July 4th, whining and shaking. We play some soothing music (supposedly dog calming cd’s) often and that helps him desensitize. Since we started doing that he is much better. But he has had problems over time, nothing sudden or drastic. I wouldn’t shy away from bloodwork again either, something may be going on. One thing you could try is carrying him outside, feel his heartbeat. If he is really stressed by it you will feel his heart racing.