Goofs

Yellow ear-tags are visible on several reindeer's ears. These tags are a modern way of identifying ownership of reindeer. The traditional way of tagging reindeer was to cut unique markings in their ears.

In the first scene that the great landscape is shown, the reindeer are in front on top of the mountain. Underneath a great lake, and on the lake down to the right there is a small boat (the waves are very visibly moving from right to left).