Hi friends! We have 10 chicks who are 2 weeks old today. We have them in our upstairs loft area. We used cardboard for the floor, covered with pine shavings and then interlocking cardboard walls from My Pet Chicken. They have a feeder, a waterer and two heater panels. Things have been fine but we are wondering what we are supposed to do when they get bigger? One has already flown outside of the coop--- I suppose we could put some netting over the brooder for that issue--- But will 15 square feet be enough space for growing chicks in the upcoming weeks? I guess my question is: will we need to upgrade or change our brooder situation before they are put in their outside coop? If so, any affordable ideas for this?