We had the tradition that animals in the barns, especially horses, would kneel down at midnight on Christmas Eve in honour of the Christ Child, a notion I always found charming in the extreme even though I never quite believed it. I don't know that this is a particularly Scottish tradition, in fact in light of what has already been posted I guess it isn't, but British folks always talked up the kneeling thing big when we where children. Of course this couldn't be tested even by farm children because of the hazard of preventing a visit from Santa Claus....