This video shows how I was taught to clean a ruffed grouse. The method is simple and was taught to me by my father. Using the whole bird is worth the extra few minutes it takes to clean the bird.
Make sure you check your local state for regulations on field dressing.
Watch some ruffed grouse hunting action:
Autumn Blaze Ruffed Grouse Hunting 2015 https://youtu.be/HCtCujws2SA