Newly adopted cat won't eat unless hand fed...?

We are fostering a 10 month old female cat, technically still a kitten, and for the first few days she didn't eat anything. Yesterday we tried some different food, Purina One Kitten Chow, and she was more interested in it than the cheap-o dry food we had pout out for her before. But she still didn't eat it from the bowl. I held a piece of food in my hand and she licked it and then took it and ate it. I did that again and she did the same thing, then I took a piece, let her lick it and placed it in the bowl. She looked at it and sniffed it, but she wouldn't eat it from the bowl. I continued to feed her by hand, she had a little food but she walked away and was not interested. Left the food out overnight for her, but I don't think that she touched it. I'm concerned because we've had her now for 4 days. We want to adopt her, because she's a sweetheart, but her lack of eating is worrying me. Any tips?