Not any better, though no worse. She's still quacking very strangely when people get close and I noticed more light green poops in the pen this morning before letting them out but there's no way to tell if it's hers or not.
Other than deficiencies or her simply not eating/drinking enough, could she be sick? though if she was, wouldnt the others be sick by now too? It's been 8 days now.
If you think she weighs less than 11 pounds, get a digital kitchen scale and weigh her in grams or kg. then re-weigh every 2-3 days in the morning before she eats. If she's sick she will probably be losing. If losing, you should probably call the vet back and see if then can get you in sooner.
Go to this link and evaluate her body condition using the body score pictures:http://www.backyardchickens.com/t/1048620/how-to-provide-emergency-and-supportive-care-updated-1-3-2016