If so, for how much longer? I think they're about 4-5 weeks old - they have most of their feathers. They'll be staying in a large dog kennel in our (unheated garage). For the rest of the week the weather is supposed to be in the upper 60's, low 70's during the day and mid 50's at night. Starting next week the forecast is for high 50's to mid 60's during the day and mid to high 40's at night. I honestly can't remember how long we kept our older chickens under a light for.