Only if she's getting stepped on by the others or not quite mobile, yet.
As was mentioned in a previous post, if you have another gentle chick to put with her to keep her company.
I would make sure the brooder she/he is in was at 85°F, with food and water at the 'cool end' of the brooder. In fact, I would move all of the chicks to an inside brooder. Without a momma hen to get under in those temps, they can become chilled very quickly.