Before i purchase the car seat, I had him in a purse and he would throw up in it cause of his motion sickness. I had purchase a car seat from Ebay for Sparky. I love this car seat. It wraps around the headrest. He sleeps in there and can pop up and see the view if he wishes. I put a leather fabric on it, just in case he throws up so that it would be easier to wipe off as oppose to cleaing the fabric. He seem to like the car seat. This is the one i have.
http://cgi.ebay.com/DOG-PET-CAR-BOOS...QQcmdZViewItem
Attach is a picture of sparky in it.