Vin had this problem when he was little! he would drool really badly from his mouth and nose and then after about 15 mins would be sick! he would shake and not get in the car!!
i live a 3 minute walk to the common we walk in, but we drive about 5 minutes up the road to the middle of the common so all times in the car end in fun and not ever enough time to actually be sick!! he can now happily go 30mins with no problems!
i live a 3 minute walk to the common we walk in, but we drive about 5 minutes up the road to the middle of the common so all times in the car end in fun and not ever enough time to actually be sick!! he can now happily go 30mins with no problems!