We got 4 baby chicks May 1st from Tractor Supply. They said they were about a week old so they should about 4 weeks now. We live in Southern California where it is mid 70s to mid 80s pretty consistently now with an occasional high 60s overcast day. The nights are mid 50s. Yesterday I put them outside in the sun for a couple hours in a toddler gate enclosure with a cover so hawks can't grab them. At what point can they go in the coop overnight? We are building their coop/run this weekend but not sure when they can move full time. Picture attached so you can see their feathers.