how do i acclimate(sp)a new hen??

Chickens are hardy. She'll be fine. Just give her lots of love during the quarantine, folks quarantine birds alone all the time. I'd also feed her cracked corn to help produce heat. You can do it yourself from the cobs or it should be available at your feed store or home depot.

 

How old is this pullet you are talking about? Fully feathered, or a chick? It is very difficult to have a single bird, yes. Chickens are social and do much better with others. In winter they roost closely and produce body heat for warmth. I would not suggest putting a Silkie outside, alone in winter at all.

Corn will not produce heat. That is a myth.