I will add to what Beverly wrote by stating that the use of hounds for hunting, in the United States, is not only guided by the MFHA. The MFHA code of ethics is marvelous, and is a testament to mounted foxhunters that they abide by it very strictly.
The ethics of hunting, including the concept, definition, and ethical aspects of “Fair Chase” are deeply rooting in American sporting community.
In the US, we are fortunate to have had people like Aldo Leopold to help define, shape and create the ethics and sportsmanship of hunting in America. These ethics, created in America for American hunters, is reflected in the MFHA. While mounted foxhunting is similar to foxhunting in the UK, there are distinct differences which make the sport in the US unique. In the US, wildlife is a public resource. Historically, in other countries wildlife was the property of the landowner. Landowners were members of the upper classes.
This isn’t the case in the United States. Here, anyone can hunt, regardless of race, gender, or income level. Wildlife belongs to Americans, not just a wealthy few.
Much of the ignorance about hunting with a hound revolves around the perception of what constitutes Fair Chase. Understanding what Fair Chase is makes every bit of the MFHA ethics very clear.
Every ethical hunter abides by the concept of Fair Chase. In the case of using a scent hound, the odds are always on the quarry. Whether the quarry is a prey animal or predator doesn’t matter, the odds are always in favor of the quarry.
In the wild, quarry has many escape routes. To be considered Fair Chase, those escape routes must never be cut off; by human, by stopping earth, or by a hound. That would not be ethical.
I read many comments about “quarry being run to exhaustion”. Such people do not realize that this method of hunting has been studied by wildlife biologists in the US, and quarry are never subjected to the risk of myopathy. And that is because it is not the quarry that is working hard. It is the hounds, and the hunter has control over the welfare of his or her hounds.
These comments are made by people who don’t understand how hunting with hounds works; the science of it. Unfortunately, these studies are often 500-700 pages long. Few people (outside of the scientific community) read them.
Suffice to say that an entire set of ethics guides the hunter, and paramount is that the ethics of Fair Chase are observed.
If a person is opposed to hunting, then the science supporting this method of wildlife population control will fall upon deaf ears. But it does exist, though this body of knowledge cannot be condensed into a Wikipedia entry.