A more thorough explanation:

A legal fence, also known as a lawful fence, is a strong and sturdy barrier that is built to prevent animals from escaping a property and to protect the property from trespassers. It is a fence that meets the legal requirements set by the state or local government.

For example, in some states, a legal fence must be at least four feet high and made of materials such as wood, wire, or metal. It must also be well-maintained and in good condition.

A legal fence is important for farmers and ranchers who need to keep their livestock from wandering off their property and causing damage to neighboring properties. It also helps to prevent accidents and injuries caused by animals that escape from their enclosures.

Overall, a legal fence is a necessary and important part of property ownership, especially for those who own animals or live in rural areas.