We got the mulch into the run today, and let the chicks spend the afternoon in the run, while we worked on coop prep and got a lot done. They really seemed to get into exploring the space more. By sunset they were making distressed sounds again. They are back into the brooder box tonight. Do they look ready to move into the coop this week? They are 4 1/2 weeks old. We're in Texas, lows are mid 60s to low 70s.