This is a fanart, of a fanfiction. (we need to go deeper!).
The fanfic is here: [link]
I haven't been able to get that story out of my head. It is extremely well written and could make a dragon cry.
This is Derpy as a filly with her favorite doll "Miss sweetie"
(btw, her tail is behind her, and she cant fly in the fic, so her wings are furled.)