Animals are prone to various diseases. Some of these may leave permanent damage while others are fatal. One example, which could go either way, is equine colic. This happens when the horse experiences pain in the abdomen and things can get worse if medical attention is not administered immediately.
If the doctor has not arrived yet, the person can do certain things, which can help in the treatment. This includes taking the temperature and monitoring the heart rate, recalling what kind of food was given the past few days as well as the water consumption and checking the color of the gums.
The veterinarian may be on call elsewhere so until help arrives, no food must be given to the horse. It will also be a good idea to walk the animal so it will not think about the pain. If the creature does not want to get up but it still continues to roll on the ground, everyone should help out and transfer the horse elsewhere so it does not inflict any damage to itself or others.
The doctor will usually give the horse some antibiotics. This will help ease the pain and it is a wait and see game after that to see if there are any improvements. Some horses recover quickly...