Hi Lindsay, I can relate to Cooper's problem as I'm a human with that problem. A lot depends on the type of vehicle and its stability on the road coupled with driving technique. I have a friend who zooms up to bends and turnings, hits the brake and then whooshes around the corner and that is guaranteed to have my stomach become unsettled. I thanked God when automatic transmissions became common place because my husband could dislocate my neck with his gear changes, again all that bracing had me reaching for the bucket again. Another friend dawdles along swaying like a drunken driver and that too upsets my equilibrium. My only sure fire way to have a comfortable drive is to take the wheel myself! Not an option for the dog although mine like to sit in the driver's seat while waiting for me:-)
Oh and another is when the shocks are starting to go that boat on the ocean sensation is not good! Try gravol:-) Rose