Baby chicks typically need a heat lamp for about 6 weeks, which corresponds to the period until they are fully feathered and able to regulate their own body temperature

. During the first week, the brooder temperature should be around 90-95°F (32-35°C) and then gradually lowered by about 5°F (2-3°C) each week as the chicks grow and develop feathers

. By about 6 weeks of age, chicks generally no longer require supplemental heat because they can maintain their body temperature independently

. The exact duration can vary depending on factors such as the breed of the chick, ambient temperature, and housing conditions. For example, in warmer home environments (around 75°F), heat lamps might be needed only up to 4 weeks, while in cooler barns or garages (around 60°F), heat may be required for the full 6 weeks

. It is important to monitor chick behavior to adjust heat appropriately: if chicks huddle closely and chirp loudly, they are too cold; if they spread out and pant, they are too hot

. The heat lamp should be gradually raised or the temperature reduced over time to help chicks acclimate. In summary:

• Heat lamp needed from hatching until about 6 weeks of age.
• Start at ~95°F first week, reduce ~5°F weekly.
• Duration depends on breed and environment.
• Monitor chick behavior to adjust heat accordingly.

This approach ensures chicks stay warm and healthy during their early development stages.