We have a 4-month old v female who is an absolute joy all day long - playful but loves to snuggle, takes more naps some days and less others. She loves to be held, and I probably do carry her too much, but she is doing a better job every day getting used to her leash. The problem is - when the clock strikes 7:00pm and our family has settled into some place around the living room or kitchen of office, she becomes a crazy dog! She's nippy, runs around the house at top speed, growls, really digs in her puppy teeth which I know is just play for her but it's SO incredibly different from her daytime personality. And it seems she spirals into crazier and crazier energy. By then, it's dark, so outside fun isn't really an option. Is she overtired? She gets tons of exercise and stimulation during the day. Just not sure how best to address this. Anyone?