Also, with the feeding part, are you giving any canned food and if not, will they let you? You can feed canned close to you, so she can get used to you more and associate you as the person that gives her good things. As stated before, the more you can just sit and let her come to you, the better. Make sure you are relaxed and maybe read a book or watch tv and don't pay attention to her. She should, if not come around, at least not attack you when you try to leave.
One last thing, maybe a short video of her playing would lift her owner's spirits. If you have a smart phone or maybe he has one you could try that. She definitely wouldn't be herself if taken to the hospital.