Annabelle's Wish (1997)

Annabelle - a calf who has a special wish for Christmas - wants to be a reindeer and help Santa Claus drive his sleigh as he delivers his presents! Annabelle's friends tell her not to get her hopes up, but to everyone's surprise, Santa does indeed meet up with Annabelle, and the calf gets to help Santa make the holiday special for one young boy.