It's been a long time since I had a puppy but if he's very young or tiny, I would be tempted to rub some Nutrical on his gums when we first got in the car and before I put him in his safe carrier/seat in case the breeder hasn't fed him prior his trip in order to prevent him getting carsick. So if he's empty, hasn't eaten for a while, he might get hypoglycemic. And then I'd probably give him a bit more after getting him home and settling him quietly into his new surroundings.
__________________ Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |