Md. Code, Criminal Law § 10–620

(a) In this section, “equine” includes horses, donkeys, mules, and ponies.

(b) This section does not apply to the owner of the equine or a person acting on behalf of or at the direction of the owner of the equine.

(c) A person may not:

(1) willfully and maliciously interfere with, injure, destroy, or tamper with an equine used for:

(i) racing or breeding;

(ii) a competitive exhibition of skill, breed, or stamina; or

(iii) any other lawful activity;

(2) willfully start, instigate, engage in, or further an act that interferes with, injures, destroys, or tampers with an equine used for:

(i) racing or breeding;

(ii) a competitive exhibition of skill, breed, or stamina; or

(iii) any other lawful activity; or

(3) commit an act that tends to interfere with, injure, destroy, or tamper with an equine used for:

(i) racing or breeding;

(ii) a competitive exhibition of skill, breed, or stamina; or

(iii) any other lawful activity.

(d) A person who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $1,000 or imprisonment not exceeding 1 year or both.