Some folks on this forum feed yogurt to their chickens - I'm one of them. You might try mashing up some layer pellets and mixing it in with the yogurt. If she eats it she would be getting the better food, but also the benefit of the friendly bacteria in the yogurt, which, after looking at your images, she definately needs! Make sure you get yogurt with ACTIVE culture. Should say on the container. Dannon is a brand, but lots of plain yogurt contains this.
Best of luck!
Mac
Best of luck!
Mac