First, you have to realize that it was -25°F today. So the dogs weren't exactly feeling like playing all that much. In fact, if you watch Ole closely, you'll see him actually stand on his front two feet for a second! But both dogs are adapted and used to these temperatures and as you can see, did have quite a bit of fun!
These apples are totally frozen. They feel like billiard balls, but they're a bit lighter. Small nibbles might be had, and the used one obviously has some scratches on it, but there isn't any way they are going to chew these apples up!
They do get to eat non-frozen apples in the house, though!