Make sure they do NOT use Acepromazine (aka Ace) on your boxer for any reason.
Here is a sticky from the health concerns forum explaining why : http://www.boxerforums.com/modules.php? ... pic&t=1514
Even if your vet says they have used it on other boxers before without problems (mine said this!) do not let them use it- make them print in large red letters on his file "No Ace"
Other than that, all I can say is good luck Lorenzo!