Biddy used to get car sick everytime we took her out. She's grown out of it now, but now she hates the car!! She cries and cries everytime we go for a ride
I think it reminds her of when she used to get sick & she's afraid she's going to get sick again! Or maybe I'm reading too much into it & she just hates the car in general!
Anyhow I hope Bentley gets better!!!