Loaded Shoulders: Excessive development of the muscles associated with the shoulder blades.

Lobe Ear: Ears which are lightly folded and set at the back of the head.

Loin: The region of the body associated with the lumbar portions of the vertebrae column (i.e., behind the ribs and in front of the pelvic girdle).

Loose Slung: Construction in which the attachment of the muscles at the shoulders is looser than desirable.

Lower Thigh: See Second Thigh

Lumbar Vertebrae: The seven vertebrae of the loin region.

Lumbering: An awkward gait.

Lurcher: A crossbred hound.

Lure Coursing: Organized performance event for sighthounds which demonstrates those breeds' ability to perform their historical work by chasing an artificial lure over a course.

Luteinizing Hormone (LH): A hormone produced by the anterior lobe of the pituitary gland that stimulates ovulation and the development of the corpus luteum in the female and the production of testosterone by the interstitial cells of the testis in the male.

Luxating Patella: A problem that causes the kneecap to slip when the joint is moved. Transmitted genetically and can lead to lameness.

Luxation: Dislocation of an anatomical structure.

Lyme Borreliosis: More commonly known as Lyme disease, an infectious arthritis caused by spirochete bacteria.