I recall a film from childhood(1950s), but have been unable to find out the title or any other information about it. From what I remember, it involved a little girl with a sick/dying parent. The child had been told that if a cow knelt down at midnight on Christmas Eve, a miracle would happen. This child lived in a city, so chances of finding a cow were pretty slim. I recall the child ending up in a railyard and finally finding a cattle car. Of course, a cow did kneel just as the clock was striking twelve. Anybody remember this one besides me?

Your movie is Tenth Avenue Angel.