Would a vivacious dog lie down when you enter the room?

A vivacious dog is typically energetic and playful, so it might not lie down immediately upon your entrance. Instead, it may greet you with excitement, wagging its tail and wanting to engage. However, if it feels calm or tired, it might choose to lie down while still being alert to your presence. Ultimately, the dog's behavior can vary based on its personality and energy level at that moment.