Hi folks. Our 13 week-old female fox-red seems overly relaxed. She plays well but throw a stick or a ball and she just looks at us - not interested. When going for a walk, she sniffs about and doesn't tear around at all. Have to really encourage her to get moving. She sleeps a lot. Eats fine and gets amazingly animated when food is being prepared. Had second vax over a week ago. Vets checked her over and all good. I didn't think such relaxed labs existed. What do you think?