Chicks can go outside safely when they are fully feathered , which typically happens around 5 to 6 weeks of age. Being fully feathered allows them to regulate their body temperature without needing extra heat sources. The outdoor temperature should generally be above 15.5°C (about 60°F) , especially at night, to keep them comfortable and healthy without supplemental heat. Before moving chicks outside permanently, ensure these conditions:

• Chicks are fully feathered (no downy fluff remaining).
• They are at least 5-6 weeks old.
• Outdoor temperatures are consistently warm, ideally above 15.5°C.
• The outdoor area is safe, predator-proof, and weather-protected.
• Gradual acclimation by starting with short supervised outdoor visits is recommended.

Chicks can start going outside for short supervised "field trips" earlier, around 3 to 4 weeks old , if the weather is warm enough (above about 18-21°C or 65-70°F during the day) and they have access to warmth if needed. By around 6 weeks old, most chicks can stay outside full-time during warm weather. In cooler climates or if nighttime temperatures drop below 15.5°C, supplemental heat should be provided until chicks are ready to handle the change in temperature on their own. To summarize, the key signs that chicks are ready to be outside are that they are fully feathered, the weather is warm enough, and they have a safe place to stay outside. Start with supervised outdoor time at about 3-4 weeks, then transition to permanent outdoor living around 5-6 weeks old under suitable conditions.