The U.S. military's UCMJ Marine defines maiming as an act in which a person "... who, with intent to injure, disfigure, or disable, inflicts upon the person of another an injury which—”
The following is an example of a state law dealing with maiming of animals:
"Section 7771. Maliciously killing, maiming or disfiguring domestic animal. Every person who shall willfully and maliciously kill, maim or disfigure any horse, cattle, dog, or other domestic animals of another person; who shall willfully and maliciously administer poison to any such beasts, or expose any poisonous substance with the intent that the same shall be taken or swallowed by them, shall be guilty of a misdemeanor; and being thereof convicted, shall be sentenced to pay a fine not exceeding five hundred dollars, or to undergo an imprisonment, by separate or solitary confinement at labor, not exceeding three years, or either, or both, at the discretion of the court: Provided, That the provisions of this act shall not apply to the killing of any animal taken or found in the act of actually destroying any other domestic animal."