Awhile back I wrote to you all asking about dogs and car sickness. I got tons of replies and helpful ideas on possible cures/solutions. However, yesterday i noticed that when I put her in the car (station wagon) and I was sitting with her with the rear hatch open, she would start to foam at the mouth WITHOUT THE CAR MOVING AND THE DOOR OPEN. Therefore, this is more than car-sickness. Do I handle this the same way as a dog who gets car sick? Do I do the desensitizing? Little rides ending with happy outcomes? Or is this different?