Wow, poor baby. I love greyhounds and have wanted one for years but they just don’t mix well with chickens or outdoor cats. Hopefully your veterinarian prescribed some antibiotics, topicals, and some chlorhexadine to clean the wounds with. How is she doing today? You could get some higher protein food to help her heal faster-like a game bird or flock raiser feed. Or add cat food, tuna or eggs to her diet. Best of luck.