In Nintendogs + Cats, the "Lie Down" command has a hard-coded duration of about 5 seconds. You cannot extend this through settings, items, or cheats—it's a fixed animation timer. However, there are creative workarounds to keep your pup in a down position longer.
The 5-second cap is likely a design choice to keep interactions snappy and prevent the game from feeling like a "wait simulator." The developers wanted players to actively engage with their pets, not just stare at a sleeping dog.
While you can't force a prolonged nap, these tricks let you create cute moments for photos or just enjoy your virtual companion's obedience.