He is soon to be 7 months old and weighs 6.5 lbs. Here lately he has become very content to just lie around the house. I am used to him having the zoomies. He used to want to go out into the backyard to run around with his brother. But now he's just so darn lazy. Part of the problem I know is the heat, it's extremely hot outside for him with all that hair. But even inside he's not as active as he used to be. Is it normal for the Yorkie to start settling down around 7 months?