My chicks (27 of them) are 2 weeks and 3 days today and they are still in the brooder. We have them in a big galvanized feeding trough (round) with a red light. They are doing great! My question is this: When can I take them out of the brooder and allow them into the main coop? They are using the waterers as a stepping stone to the rim of the brooder. It won't be two more days until I find one out and alone on the floor of the chicken house. I could add a roof to the brooder but I would really rather let them out and get used to the new house. Of course they would have their heat lamp still but I don't want to traumatize them. Any advice would be appreciated!
This is a pic of the brooder before the chicks arrived. The floor is covered in wood shavings now too.

This is a pic of the brooder before the chicks arrived. The floor is covered in wood shavings now too.