My chicks are 3 weeks old now and have been living in our house in a big crate with a heat lamp. I have tried turning the lamp off occasionally but they seem to still need it. Feathers are growing very fast. I am thinking about moving them outside to a garden shed at the end of next week and setting up the heat lamp for night time. Temps here at night are around 10degrees centigrade. Does this seem ok to you experienced chick raisers? Once they have full feathers they should be ok with colder temps right?