Can you keep baby cockatiel warm with a bulb in a box?

Yes, you can keep a baby cockatiel warm using a heat bulb in a box, as long as it's done safely. Ensure the box is well-ventilated and that the bulb is positioned at a safe distance to prevent overheating. Monitor the temperature to maintain a warm but comfortable environment, ideally around 85-90°F (29-32°C). Always provide an area for the chick to move away from the heat if it gets too warm.