We have a mini Golden Doodle who weighs 35 lbs. Ever since we got him 5 years ago, we will not lay down to save his soul when traveling. Pants almost the whole time. If he does lay down, it's very short, then right back to sitting up. Never sleeps. Asked the vet 2 years ago for suggestions and they said to try Damamine or Benedryl. Did the 2nd and no luck. Still sat up and just paned. What have others done if you've had the same problem?