To go outside? Temps are in the high 80's to mid 90's during the day, and stay above 70 at night. Chicks are almost 5 weeks, and ducklings are 4 weeks. Chicks are Welsummer and Marans, ducks are runner and swedish. I will be putting them into a modified rabbit hutch so it has a full roof and the "outside" run is open to only 2 sides, and has a fully enclosed house for them to get into. I only have them under a florescent bulb during the day and no light at night in the house. The chicks seem mostly feathered but the ducks seem not to have any feathers at all they are still very fluffy and downy.