I was wondering if anybody has a thundershirt for their dog? I have a collie that is extremely anxious in the car and was thinking of buying one for her. If not does has anyone got any tips for calming an extremely anxious fearful dog in the car. I have been working with her in the car since February and she is not getting any less anxious. I started with just sitting in a stationery car with treats for a few days, then I moved onto quick five minute trips. She started agility classes in March which is about 20 minutes away in the car and buy the time we get there she is extremely anxious.