My older kitty, Spot, goes to the vet frequently. At first, he was urinating on the way home from the vet. Then he started defecating on the way home from the vet. A couple of months ago, he started defecating on the way to the vet's office. Today, he pooped on the way there, and again on the way back (we were only at the vet's office for 15 minutes or so). Has anyone else experienced this? He never goes outside his litterbox at home, and his feces at home are normal. Any ideas on how to prevent this (or make it less messy)? I tried putting down a puppy pad, but I only had the one today, so it didn't help on the trip home.