My pup (Malley) is almost 12 weeks old. Malley was a typical puppy from 7-11 weeks, but now she seems to have a lot less energy. She isn't interested in doing any retrieving, doesn't seem to want to do any walking, has stopped biting (which is nice but odd), and just is generally mellow and wants to cuddle and hang out. Should I be concerned or is this just part of her growing spurt she is in? Could it be related to the dog we "dogsat" for the last two days- just out of the routine of life? Or is a mellow 12 week old lab as odd as it feels?