My 13 week old pup is really struggling with the car. We have tried just making tiny 2 minute journeys as advised by the vet and have tried foot well, car seat and crate in front, back and boot of car but nothing seems to help. He will either throw up or wee/poo literally as soon as we leave. I’m going back to work in two weeks and pup will be going to work with my partner and will be in the van every day travelling. Any tips to help him travel better or any supplements etc that work? Mandatory photo attached.