We haven't used RR, but we tried a different homeopathic type. One type that is supposed to help for car sickness & one for the stress and it didn't help with either!
Crosley is anxious in the car. She always wants to go, but about 5-10 minutes in she starts whining, then barking, then this shrill type barking that drives you mad!
Camden is calm as can be, but throws up! We have tried everything with her & nothing has helped.
We have also bought the plug in & spray from Petedge for the house & to spray in car. I think that was comfort zone. That didn't do anything either!
I think you were supposed to wait like 30 min. after spraying in the car.
Now we try and wear Crosley out first, because then she sleeps! We try and make sure it's far enough from dinner time for Camden!
Good luck!