Purely from a medical perspective, some immediate thoughts:
Skin was torn in a fairly suture-able pattern, however, for the sake of cleaning the wound and the no doubt severe swelling which has ensued since this photo was taken, I'd imagine it will probably be left at least partially open.
Depending upon what bones are fractured and how severely, they will likely preform an open reduction, internal fixation. She will very probably lose all of the skin atop the foot, anyhow, as feet can be notoriously horrid in terms of wound healing, even in healthy teens with excellent perfusion (very hard getting ample enough supplies of healthy blood to those tissues so near the toes to clean the wound and allow for rapid healing.
She (poor girl!) is no doubt looking at potentially a full year of surgery/wound care/OT & PT to get anywhere near "normal". She will have a very high risk for infection, and a need for some serious restructuring of that foot. Its so odd to me how with the body, these non-life-threatening injuries can often be worse in terms of healing than more "significant" injuries which occur closer to the central part of the body!
Anyhow, I pray for as rapid as possible recovery for this girl who didn't do anything "deserving" of this type of sufferring. She merely made a common teen "error" of not listening to rational concepts, such as wearing protective footwear at the barn at all times!
"I'm too busy working on my own grass to notice if yours is greener"