Moushley was watching the race, commentating on it in her own way, which is all squeaks. Occasionally, she looks at Pinkie Pie or Starlight Glimmer, perhaps to join them.
But then, Socrate gets her attention again. She tilts her head at first, then notices the cheese. With a delighted squeal, she races around Socrate happily. Then, lifting the gigantic piece of swiss, she eats in whole in one bite.
Moushley is happy.
In fact, as soon as she returns to her normal shape, she gives Socrate a big hug to thank him for the cheese.