I've thrown a ball out into the mainly clear area above and it is well buried down in the snow. Kira did a lot of running circles in the area, concentrating more to the left of where the ball was. Once she ruled out most places, she slowed down a little and found it quite readily.
When she located it, she had to shove her nose/face way down in and then dig it out. It's in her mouth now.
So a few easy throws down a path and she was happy. Although she probably would have liked to carry on...I was frozen and called it quits. A little fun for her though.