ORIGINAL: coolbrze0
What do you mean when they yard? Is this when the snow is too deep in the woods/mountains and they come to civilization, hence yards?
Yard means that they gather in a herd in open meadow areas. There is safety in numbers generally. They also keep warm that way too. With all the hooves walking around, it would make for easier digging through the snow looking for food.
This is a common practice in heavy snow areas and in mountainous areas.
Emery