A dog that gets car sick having an enclosed crate, like a airline crate, usually does better as there is less to watch. I use to have a collie that got sick in the car, and I found that a vari kennel ( air line crate) with a blanket over the sides and back - he did much better and seldom got car sick. This will also work with your other one if the dog perceives the crate as a safety place...