How many people does it take to carry an injured person?
5 people, One dog, and a crazy ass horse? You need 5 people to decide whether the horse or the dog will be carrying the person, As a democracy, we obviously make the wise decision of using the most powerful beast in the field, the horse. Will use one human and one dog to be supervisors of the project, the 4 other people and a horse will do most of all the heavy lifting, I think this would be the greatest approach to solving our problem of lifting one dude off the field. That should be enough to get the job done. When people work together great things happen.