Quote: Chicks need starter feed. You should be able to find that at any feed store. Any feed store that carries the Purina line of chicken feed should have Purina Flock Raiser. It is somewhere around 20% protein feed and can be fed to all birds, chicks included.
I don't keep silkies, but some people will tell you that they are delicate and do take them inside when it gets really cold. However many people don't do this and let them weather out the cold in the coop. I think it boils down to the individual bird. If you feel one may be somewhat weak, you might need to bring that one inside during a big cold snap. But get them back outside as soon as you can so they not only mix back into the flock easy, but will still tolerate the outdoor temps.