car ride fear

Hello all, I have a 1.5 year old Heeler/border collie and he is suddenly getting scared while in the car. It's mostly when a semi goes by but getting worse with other vehicles. He loves riding in the car and has no problem when in town but on the highway he is terrified. No reason for this...

HELP! My lab Lucifer HATES to ride in the car. So far I have only taken him on short trips to the beach etc but next week we are driving 200 miles to my parents house. What can I do to keep him calm in the car ?? He whines, foams at the mouth and shakes the whole time we are in the car. Will he...