We just brought home our new puppy, Sarge, this past week. He’s a 13 week old GSD and is precious. At the breeder, he played with his brothers, sisters and mom, but wasn’t overly energetic. At home, he is quite lethargic. He seems unmotivated and hardly has any energy. He sleeps a lot, which I know puppies do! When not sleeping he lays down and does not get up for much. He plays with a toy sometimes and has already begun fetching but this is few and far between. He mostly lies down and refuses to move. He has already potty trained in these few days, so we know he’s very intelligent. However, we’re finding it very hard to motivate him to move around and play. He went to the vet and tested negative for worms, and she said his hips looked great and his heart sounded fine. Should we just chalk this up to new environment and people? I know his little self is overwhelmed with a new home, but I’m wondering if this is extreme?