My Little Pony Friendship is Magic S02E07 720p

Summary:
After seeing her five friends enjoying a day in the park with their pets, Rainbow Dash decides to get one of her own and turns to Fluttershy for advice. She sets up a series of contests to help narrow down the field of flying creatures, but her plans go awry when Fluttershy insists that a tortoise be allowed to compete.

Thanks to Ponyarchive.