A great remedy for cats and dogs is called Rescue Remedy. It is a Bach Flower Essence that you can find at most health food stores. You can always google it to find a location near you. A friend/co-worker of mine uses it all of the time on her cats. She travels quite a bit with them to different shows and she puts about 2 drops a day or so in their water 2 weeks before she knows she is traveling! I use it on one of my dogs that was diagnosed with OCD and it really helps her a lot!
Also as long as it does not get hot in your truck, you can cover the cat carrier with a light blanket. Sometimes that helps if they are feeling anxious at all.
You are doing an excellent job with getting him used to the carrier so far in advance![]()