My dog gets awful anxiety in the car. She seems calm but really she is so anxious that once shes been on the ride for about 30 mins or more you hear that awful sound... dog vomitting. I got these treats as well as the thundershirt to fix her anxiety and they worked! I use both to be safe but I have used just the treats when Its hot out and it totally worked. No more dog throw up and I can take my girl on trips with me without the worry! I highly suggest these treats if your dog gets sick on long car rides! Also try to keep your dog's main meal of the day away from the time of travel to be safe.