that would be a good idea... but, he usually doesn't go for car trips. maybe a day after we take him to the vet. we live about 45 minutes away from the closest mall/petsmart.
that did give me a good idea though... i think i'll try to make a little boot, won't be the same... but, i could see how he would react to having something around his paw. i figure it may be like "tape on the paw" reaction though.