We just built a chicken tractor for our meaties. This is our first batch ever. They are almost 3 weeks old and mostly feathered. We have been taking them outside in the chicken tractor during the day so they can forage around and get fresh air then bringing them back into the house to their brooder at night. We are going to build a little hut inside their tractor for them to get shelter and a cozy spot to sleep in. When do you think we can keep them in there all day/night? We would turn on a heat light if it was going to be cold at night.