i would put them in the coop now. Do you have any other chickens? Introduce them carefully so they won't get injured (the silkies) I'd provide a heat lamp if it gets below 55° ish.At what age can silkie chicks come out of the brooder and into their own little coop? Mine are about a month old?? Gotta look again... they seem fully feathered but not like ADULT FULLY FEATHERED... they can just about fly a little bit. They got all silkie feathers in, but it doeant cover their eyes or head yet.. They are about 6 inches tall... maybe 7...
Its my first time having silkies and they arent near as easy to tell as large fowl are... they still seem like chicks to me... but i got chicks that are passing them up in size quick haha...