Look at this picture... for the first of Skye's year here, she couldn't have any bones because she warned the other dogs off very seriously from a long distance and I couldn't go near her either. She still grumbles a bit when the other dogs come near, but look at this:
Jesse slept on the sofa whilst Skye was chewing her bone beneath! How amazing.
She also very comfortably swapped her bone for a treat. Another thing she wouldn't do at all for many months!
And here she was chomping a little earlier: