They should be fully feathered much earlier than three months old, and even that is really only necessary if you can't/won't provide either some kind of heat source for them to use if necessary or (for larger groups and/or slightly older chicks) a well-insulated box for them to huddle in to warm up.I'm a first timer raising chicks, and I was always told and read that they need to be fully feathers before they can go outside. Although its been in the 70s, and into the mid 80 here is NW Florida. Is there something that I'm missing?