She likely was neglected so she never learned the concept of play. I have had many rescue dogs over the years and often found them not so playful. One of my dogs now is a flat coated retriever who I found starving in the Everglades. By nature these dogs are high energy and playful...her, not so much. That said, once she adjusted to her new life, she did open up a lot and is now a very social and confident dog. Give it time, you'll have a very grateful and loyal companion.
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