Wow, she is REALLY favoring that left leg. My first hunch is it is unrelsted to the back injury. Have you looked her over for other injuries? I wonder if this girl might benefit from a little aspirin (I direct dose half an 81mg tablet) and s chicken sling to tske her weight off the leg. Then you could orop food amd water within her reach. If she’s a littke more comfortable, maybe she’ll eat better.