Play is learned behavior. If she didn't learn to play from her littermates and Mom, it, like all other behaviors, is harder to pick up later!

I have several dogs who were working sled dogs from the time they were young puppies. None of them knew how to play when they arrived here. Most of them have figured it out over a number of years, but none of them ever seem to fully understand the joys of Husky wrestling. They prefer the calmer, more solitary games!

She sounds like a lovely companion! I bet, if she is eager to please you, she would excel at something like agility or Rally obedience.