I just read about how well Coturnix put up with Ohio winters. My babes are three weeks old and look fully feathered but I'm afraid to put them outside. My husband thinks they're ready. We have their temp in the house at 80 degrees under the lamp and cooler at the other end of the brooder. I'm in Central Florida and right now it ranges from 30 to 70 degrees. When are they old enough to go out? Three weeks seems sooo young!