In a case like this, with little injury but likely a great deal of stress and muscle strain, I wonder if they would give the horse some veterinary Valium.
In Germany, it is a big priority at the scene of accidents to use Valium to both fend off shock, and to settle down people who are very agitated or angry. This is not voluntary. As soon as paramedics arrive, they cast an eye to anyone, even onlookers, who look like they are becoming overly emotional. Because one shot in the arm, and you *can’t* become emotional. You will keep your cool even in the middle of a fire. The police will help them do this.
It is superb for those who have been in situations so stressful that the stress itself might injure them, especially older people. And it does not take very much for this effect, so it is relatively safe. Last but not least, coming off of Valium is a very gentle process, so there is no big crash.