She may associate the meat with being sick, especially if she became ill shortly after eating it. Preacher refuses to eat the food he was fed at the vet clinic when he was ill. I'm sure he associates that food with the clinic and being ill. I'd say just give her more time to recover. Her tummy may still not feel up to her regular diet. Don't offer her the meat for a few days and see if she gets more excited for it after that.